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37 Cool Science Experiments for Kids to Do at Home

General Education

Are you looking for cool science experiments for kids at home or for class? We've got you covered! We've compiled a list of 37 of the best science experiments for kids that cover areas of science ranging from outer space to dinosaurs to chemical reactions. By doing these easy science experiments, kids will make their own blubber and see how polar bears stay warm, make a rain cloud in a jar to observe how weather changes, create a potato battery that'll really power a lightbulb, and more.

Below are 37 of the best science projects for kids to try. For each one we include a description of the experiment, which area(s) of science it teaches kids about, how difficult it is (easy/medium/hard), how messy it is (low/medium/high), and the materials you need to do the project. Note that experiments labelled "hard" are definitely still doable; they just require more materials or time than most of these other science experiments for kids.

#1: Insect Hotels

• Teaches Kids About: Zoology
• Difficulty Level: Medium
• Messiness Level: Medium

Insect hotels can be as simple (just a few sticks wrapped in a bundle) or as elaborate as you'd like, and they're a great way for kids to get creative making the hotel and then get rewarded by seeing who has moved into the home they built. After creating a hotel with hiding places for bugs, place it outside (near a garden is often a good spot), wait a few days, then check it to see who has occupied the "rooms." You can also use a bug ID book or app to try and identify the visitors.

• Materials Needed
• Shadow box or other box with multiple compartments
• Hot glue gun with glue
• Sticks, bark, small rocks, dried leaves, bits of yarn/wool, etc.

#2: DIY Lava Lamp

• Teaches Kids About: Chemical reactions
• Difficulty Level: Easy

In this quick and fun science experiment, kids will mix water, oil, food coloring, and antacid tablets to create their own (temporary) lava lamp . Oil and water don't mix easily, and the antacid tablets will cause the oil to form little globules that are dyed by the food coloring. Just add the ingredients together and you'll end up with a homemade lava lamp!

• Vegetable oil
• Food coloring
• Antacid tablets

#3: Magnetic Slime

• Teaches Kids About: Magnets
• Messiness Level: High (The slime is black and will slightly dye your fingers when you play with it, but it washes off easily.)

A step up from silly putty and Play-Doh, magnetic slime is fun to play with but also teaches kids about magnets and how they attract and repel each other. Some of the ingredients you aren't likely to have around the house, but they can all be purchased online. After mixing the ingredients together, you can use the neodymium magnet (regular magnets won't be strong enough) to make the magnetic slime move without touching it!

• Liquid starch
• Adhesive glue
• Iron oxide powder
• Neodymium (rare earth) magnet

#4: Baking Soda Volcanoes

• Teaches Kids About: Chemical reactions, earth science
• Difficulty Level: Easy-medium
• Messiness Level: High

Baking soda volcanoes are one of the classic science projects for kids, and they're also one of the most popular. It's hard to top the excitement of a volcano erupting inside your home. This experiment can also be as simple or in-depth as you like. For the eruption, all you need is baking soda and vinegar (dishwashing detergent adds some extra power to the eruption), but you can make the "volcano" as elaborate and lifelike as you wish.

• Baking soda
• Dishwashing detergent
• Large mason jar or soda bottle
• Playdough or aluminum foil to make the "volcano"
• Additional items to place around the volcano (optional)
• Food coloring (optional)

#5: Tornado in a Jar

• Teaches Kids About: Weather
• Messiness Level: Low

This is one of the quick and easy and science experiments for kids to teach them about weather. It only takes about five minutes and a few materials to set up, but once you have it ready you and your kids can create your own miniature tornado whose vortex you can see and the strength of which you can change depending on how quickly you swirl the jar.

• Glitter (optional)

#6: Colored Celery Experiment

• Teaches Kids About: Plants

This celery science experiment is another classic science experiment that parents and teachers like because it's easy to do and gives kids a great visual understanding of how transpiration works and how plants get water and nutrients. Just place celery stalks in cups of colored water, wait at least a day, and you'll see the celery leaves take on the color of the water. This happens because celery stalks (like other plants) contain small capillaries that they use to transport water and nutrients throughout the plant.

• Celery stalks (can also use white flowers or pale-colored cabbage)

#7: Rain Cloud in a Jar

This experiment teaches kids about weather and lets them learn how clouds form by making their own rain cloud . This is definitely a science project that requires adult supervision since it uses boiling water as one of the ingredients, but once you pour the water into a glass jar, the experiment is fast and easy, and you'll be rewarded with a little cloud forming in the jar due to condensation.

• Glass jar with a lid
• Boiling water
• Aerosol hairspray

#8: Edible Rock Candy

• Teaches Kids About: Crystal formation

It takes about a week for the crystals of this rock candy experiment to form, but once they have you'll be able to eat the results! After creating a sugar solution, you'll fill jars with it and dangle strings in them that'll slowly become covered with the crystals. This experiment involves heating and pouring boiling water, so adult supervision is necessary, once that step is complete, even very young kids will be excited to watch crystals slowly form.

• Large saucepan
• Clothespins
• String or small skewers
• Candy flavoring (optional)

#9: Water Xylophone

• Teaches Kids About: Sound waves

With just some basic materials you can create your own musical instrument to teach kids about sound waves. In this water xylophone experiment , you'll fill glass jars with varying levels of water. Once they're all lined up, kids can hit the sides with wooden sticks and see how the itch differs depending on how much water is in the jar (more water=lower pitch, less water=higher pitch). This is because sound waves travel differently depending on how full the jars are with water.

• Wooden sticks/skewers

#10: Blood Model in a Jar

• Teaches Kids About: Human biology

This blood model experiment is a great way to get kids to visual what their blood looks like and how complicated it really is. Each ingredient represents a different component of blood (plasma, platelets, red blood cells, etc.), so you just add a certain amount of each to the jar, swirl it around a bit, and you have a model of what your blood looks like.

• Empty jar or bottle
• Red cinnamon candies
• Marshmallows or dry white lima beans
• White sprinkles

#11: Potato Battery

• Teaches Kids About: Electricity
• Difficulty Level: Hard

Did you know that a simple potato can produce enough energy to keep a light bulb lit for over a month? You can create a simple potato battery to show kids. There are kits that provide all the necessary materials and how to set it up, but if you don't purchase one of these it can be a bit trickier to gather everything you need and assemble it correctly. Once it's set though, you'll have your own farm grown battery!

• Fresh potato
• Galvanized nail
• Copper coin

#12: Homemade Pulley

• Teaches Kids About: Simple machines

This science activity requires some materials you may not already have, but once you've gotten them, the homemade pulley takes only a few minutes to set up, and you can leave the pulley up for your kids to play with all year round. This pulley is best set up outside, but can also be done indoors.

• Clothesline
• 2 clothesline pulleys

#13: Light Refraction

• Teaches Kids About: Light

This light refraction experiment takes only a few minutes to set up and uses basic materials, but it's a great way to show kids how light travels. You'll draw two arrows on a sticky note, stick it to the wall, then fill a clear water bottle with water. As you move the water bottle in front of the arrows, the arrows will appear to change the direction they're pointing. This is because of the refraction that occurs when light passes through materials like water and plastic.

• Sticky note
• Transparent water bottle

#14: Nature Journaling

• Teaches Kids About: Ecology, scientific observation

A nature journal is a great way to encourage kids to be creative and really pay attention to what's going on around them. All you need is a blank journal (you can buy one or make your own) along with something to write with. Then just go outside and encourage your children to write or draw what they notice. This could include descriptions of animals they see, tracings of leaves, a drawing of a beautiful flower, etc. Encourage your kids to ask questions about what they observe (Why do birds need to build nests? Why is this flower so brightly colored?) and explain to them that scientists collect research by doing exactly what they're doing now.

• Blank journal or notebook
• Pens/pencils/crayons/markers
• Tape or glue for adding items to the journal

#15: DIY Solar Oven

• Teaches Kids About: Solar energy

This homemade solar oven definitely requires some adult help to set up, but after it's ready you'll have your own mini oven that uses energy from the sun to make s'mores or melt cheese on pizza. While the food is cooking, you can explain to kids how the oven uses the sun's rays to heat the food.

• Aluminum foil
• Knife or box cutter
• Permanent marker
• Plastic cling wrap
• Black construction paper

#16: Animal Blubber Simulation

• Teaches Kids About: Ecology, zoology

If your kids are curious about how animals like polar bears and seals stay warm in polar climates, you can go beyond just explaining it to them; you can actually have them make some of their own blubber and test it out. After you've filled up a large bowl with ice water and let it sit for a few minutes to get really cold, have your kids dip a bare hand in and see how many seconds they can last before their hand gets too cold. Next, coat one of their fingers in shortening and repeat the experiment. Your child will notice that, with the shortening acting like a protective layer of blubber, they don't feel the cold water nearly as much.

• Bowl of ice water

#17: Static Electricity Butterfly

This experiment is a great way for young kids to learn about static electricity, and it's more fun and visual than just having them rub balloons against their heads. First you'll create a butterfly, using thick paper (such as cardstock) for the body and tissue paper for the wings. Then, blow up the balloon, have the kids rub it against their head for a few seconds, then move the balloon to just above the butterfly's wings. The wings will move towards the balloon due to static electricity, and it'll look like the butterfly is flying.

• Tissue paper
• Thick paper
• Glue stick/glue

#18: Edible Double Helix

• Teaches Kids About: Genetics

If your kids are learning about genetics, you can do this edible double helix craft to show them how DNA is formed, what its different parts are, and what it looks like. The licorice will form the sides or backbone of the DNA and each color of marshmallow will represent one of the four chemical bases. Kids will be able to see that only certain chemical bases pair with each other.

• 2 pieces of licorice
• 12 toothpicks
• Small marshmallows in 4 colors (9 of each color)
• 5 paperclips

#19: Leak-Proof Bag

• Teaches Kids About: Molecules, plastics

This is an easy experiment that'll appeal to kids of a variety of ages. Just take a zip-lock bag, fill it about ⅔ of the way with water, and close the top. Next, poke a few sharp objects (like bamboo skewers or sharp pencils) through one end and out the other. At this point you may want to dangle the bag above your child's head, but no need to worry about spills because the bag won't leak? Why not? It's because the plastic used to make zip-lock bags is made of polymers, or long chains of molecules that'll quickly join back together when they're forced apart.

• Zip-lock bags
• Objects with sharp ends (pencils, bamboo skewers, etc.)

#20: How Do Leaves Breathe?

• Teaches Kids About: Plant science

It takes a few hours to see the results of this leaf experiment , but it couldn't be easier to set up, and kids will love to see a leaf actually "breathing." Just get a large-ish leaf, place it in a bowl (glass works best so you can see everything) filled with water, place a small rock on the leaf to weigh it down, and leave it somewhere sunny. Come back in a few hours and you'll see little bubbles in the water created when the leaf releases the oxygen it created during photosynthesis.

• Large bowl (preferably glass)
• Magnifying glass (optional)

#21: Popsicle Stick Catapults

Kids will love shooting pom poms out of these homemade popsicle stick catapults . After assembling the catapults out of popsicle sticks, rubber bands, and plastic spoons, they're ready to launch pom poms or other lightweight objects. To teach kids about simple machines, you can ask them about how they think the catapults work, what they should do to make the pom poms go a farther/shorter distance, and how the catapult could be made more powerful.

• Popsicle sticks
• Rubber bands
• Plastic spoons
• Paint (optional)

#22: Elephant Toothpaste

You won't want to do this experiment near anything that's difficult to clean (outside may be best), but kids will love seeing this " elephant toothpaste " crazily overflowing the bottle and oozing everywhere. Pour the hydrogen peroxide, food coloring, and dishwashing soap into the bottle, and in the cup mix the yeast packet with some warm water for about 30 seconds. Then, add the yeast mixture to the bottle, stand back, and watch the solution become a massive foamy mixture that pours out of the bottle! The "toothpaste" is formed when the yeast removed the oxygen bubbles from the hydrogen peroxide which created foam. This is an exothermic reaction, and it creates heat as well as foam (you can have kids notice that the bottle became warm as the reaction occurred).

• Clean 16-oz soda bottle
• 6% solution of hydrogen peroxide
• 1 packet of dry yeast
• Dishwashing soap

#23: How Do Penguins Stay Dry?

Penguins, and many other birds, have special oil-producing glands that coat their feathers with a protective layer that causes water to slide right off them, keeping them warm and dry. You can demonstrate this to kids with this penguin craft by having them color a picture of a penguin with crayons, then spraying the picture with water. The wax from the crayons will have created a protective layer like the oil actual birds coat themselves with, and the paper won't absorb the water.

• Penguin image (included in link)
• Spray bottle
• Blue food coloring (optional)

#24: Rock Weathering Experiment

• Teaches Kids About: Geology

This mechanical weathering experiment teaches kids why and how rocks break down or erode. Take two pieces of clay, form them into balls, and wrap them in plastic wrap. Then, leave one out while placing the other in the freezer overnight. The next day, unwrap and compare them. You can repeat freezing the one piece of clay every night for several days to see how much more cracked and weathered it gets than the piece of clay that wasn't frozen. It may even begin to crumble. This weathering also happens to rocks when they are subjected to extreme temperatures, and it's one of the causes of erosion.

• Plastic wrap

#25: Saltwater Density

• Teaches Kids About: Water density

For this saltwater density experiment , you'll fill four clear glasses with water, then add salt to one glass, sugar to one glass, and baking soda to one glass, leaving one glass with just water. Then, float small plastic pieces or grapes in each of the glasses and observe whether they float or not. Saltwater is denser than freshwater, which means some objects may float in saltwater that would sink in freshwater. You can use this experiment to teach kids about the ocean and other bodies of saltwater, such as the Dead Sea, which is so salty people can easily float on top of it.

• Four clear glasses
• Lightweight plastic objects or small grapes

#26: Starburst Rock Cycle

With just a package of Starbursts and a few other materials, you can create models of each of the three rock types: igneous, sedimentary, and metamorphic. Sedimentary "rocks" will be created by pressing thin layers of Starbursts together, metamorphic by heating and pressing Starbursts, and igneous by applying high levels of heat to the Starbursts. Kids will learn how different types of rocks are forms and how the three rock types look different from each other.

• Toaster oven

#27: Inertia Wagon Experiment

• Teaches Kids About: Inertia

This simple experiment teaches kids about inertia (as well as the importance of seatbelts!). Take a small wagon, fill it with a tall stack of books, then have one of your children pull it around then stop abruptly. They won't be able to suddenly stop the wagon without the stack of books falling. You can have the kids predict which direction they think the books will fall and explain that this happens because of inertia, or Newton's first law.

• Stack of books

#28: Dinosaur Tracks

• Teaches Kids About: Paleontology

How are some dinosaur tracks still visible millions of years later? By mixing together several ingredients, you'll get a claylike mixture you can press your hands/feet or dinosaur models into to make dinosaur track imprints . The mixture will harden and the imprints will remain, showing kids how dinosaur (and early human) tracks can stay in rock for such a long period of time.

• Used coffee grounds
• Wooden spoon
• Rolling pin

#29: Sidewalk Constellations

• Teaches Kids About: Astronomy

If you do this sidewalk constellation craft , you'll be able to see the Big Dipper and Orion's Belt in the daylight. On the sidewalk, have kids draw the lines of constellations (using constellation diagrams for guidance) and place stones where the stars are. You can then look at astronomy charts to see where the constellations they drew will be in the sky.

• Sidewalk chalk
• Small stones
• Diagrams of constellations

#30: Lung Model

By building a lung model , you can teach kids about respiration and how their lungs work. After cutting off the bottom of a plastic bottle, you'll stretch a balloon around the opened end and insert another balloon through the mouth of the bottle. You'll then push a straw through the neck of the bottle and secure it with a rubber band and play dough. By blowing into the straw, the balloons will inflate then deflate, similar to how our lungs work.

• Plastic bottle
• Rubber band

#31: Homemade Dinosaur Bones

By mixing just flour, salt, and water, you'll create a basic salt dough that'll harden when baked. You can use this dough to make homemade dinosaur bones and teach kids about paleontology. You can use books or diagrams to learn how different dinosaur bones were shaped, and you can even bury the bones in a sandpit or something similar and then excavate them the way real paleontologists do.

• Images of dinosaur bones

#32: Clay and Toothpick Molecules

There are many variations on homemade molecule science crafts . This one uses clay and toothpicks, although gumdrops or even small pieces of fruit like grapes can be used in place of clay. Roll the clay into balls and use molecule diagrams to attach the clay to toothpicks in the shape of the molecules. Kids can make numerous types of molecules and learn how atoms bond together to form molecules.

• Clay or gumdrops (in four colors)
• Diagrams of molecules

#33: Articulated Hand Model

By creating an articulated hand model , you can teach kids about bones, joints, and how our hands are able to move in many ways and accomplish so many different tasks. After creating a hand out of thin foam, kids will cut straws to represent the different bones in the hand and glue them to the fingers of the hand models. You'll then thread yarn (which represents tendons) through the straws, stabilize the model with a chopstick or other small stick, and end up with a hand model that moves and bends the way actual human hands do.

• Straws (paper work best)
• Twine or yarn

#34: Solar Energy Experiment

• Teaches Kids About: Solar energy, light rays

This solar energy science experiment will teach kids about solar energy and how different colors absorb different amounts of energy. In a sunny spot outside, place six colored pieces of paper next to each other, and place an ice cube in the middle of each paper. Then, observe how quickly each of the ice cubes melt. The ice cube on the black piece of paper will melt fastest since black absorbs the most light (all the light ray colors), while the ice cube on the white paper will melt slowest since white absorbs the least light (it instead reflects light). You can then explain why certain colors look the way they do. (Colors besides black and white absorb all light except for the one ray color they reflect; this is the color they appear to us.)

• 6 squares of differently colored paper/cardstock (must include black paper and white paper)

#35: How to Make Lightning

• Teaches Kids About: Electricity, weather

You don't need a storm to see lightning; you can actually create your own lightning at home . For younger kids this experiment requires adult help and supervision. You'll stick a thumbtack through the bottom of an aluminum tray, then stick the pencil eraser to the pushpin. You'll then rub the piece of wool over the aluminum tray, and then set the tray on the Styrofoam, where it'll create a small spark/tiny bolt of lightning!

• Pencil with eraser
• Aluminum tray or pie tin
• Styrofoam tray

#36: Tie-Dyed Milk

• Teaches Kids About: Surface tension

For this magic milk experiment , partly fill a shallow dish with milk, then add a one drop of each food coloring color to different parts of the milk. The food coloring will mostly stay where you placed it. Next, carefully add one drop of dish soap to the middle of the milk. It'll cause the food coloring to stream through the milk and away from the dish soap. This is because the dish soap breaks up the surface tension of the milk by dissolving the milk's fat molecules.

• Shallow dish
• Milk (high-fat works best)

#37: How Do Stalactites Form?

Have you ever gone into a cave and seen huge stalactites hanging from the top of the cave? Stalactites are formed by dripping water. The water is filled with particles which slowly accumulate and harden over the years, forming stalactites. You can recreate that process with this stalactite experiment . By mixing a baking soda solution, dipping a piece of wool yarn in the jar and running it to another jar, you'll be able to observe baking soda particles forming and hardening along the yarn, similar to how stalactites grow.

• Safety pins
• 2 glass jars

Summary: Cool Science Experiments for Kids

Any one of these simple science experiments for kids can get children learning and excited about science. You can choose a science experiment based on your child's specific interest or what they're currently learning about, or you can do an experiment on an entirely new topic to expand their learning and teach them about a new area of science. From easy science experiments for kids to the more challenging ones, these will all help kids have fun and learn more about science.

What's Next?

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Christine graduated from Michigan State University with degrees in Environmental Biology and Geography and received her Master's from Duke University. In high school she scored in the 99th percentile on the SAT and was named a National Merit Finalist. She has taught English and biology in several countries.

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4th Grade Science Projects: Experiments, Challenges, Explorations, And More

October 14, 2023 //  by  Lauren Du Plessis

Our list of unique science projects is a sure winner when sourcing ideas that are appropriate to the 4th grade learner. Science is a vital component of STEM-based activities and our top 57 project ideas are sure to increase creativity, develop critical thinking abilities as well as effective communication and collaboration skills.

1. Flashlight Creation

Discover simple electric circuit rules when creating this nifty paper flashlight! This project is the perfect experiment for kids as it’s sure to highlight the science behind batteries.

Learn More: Flashlight Creation

2. Lemon Volcano

Have a blast creating this erupting lemon volcano! By using average household supplies, 4th graders discover the properties of both acids and bases and learn how the interaction between them causes a chemical reaction.

Learn More: Lemon Volcano

3. Earthquake Simulation

Set a dish of jelly and then go about building a structure on it. Upon completion of the structure, wobble the dish so that the jelly shakes and disrupts the structure- in turn demonstrating the science of seismology.

Learn More: Earthquake Simulation

4. Design a Hovercraft

Time after time, this proves to be one of the best experiments for demonstrating the power of the air. Unveil properties of friction and air pressure as you design a floating hovercraft!

Learn More: Design a Hovercraft

5. Make a Microscope 

A cause for STEM excitement! This wonderful project demonstrates how water droplets curve to create a convex lens and in turn, refract light and magnify objects.

Learn More: Make a Microscope

6. How Chameleons Change Color

Create a mesmerizing color show as an interactive poster that demonstrates how chameleons change color ass the middle wheel spins.

Learn More: How Chameleons Change Color

7. How Your Body is Similar to a Car

Just as we source our energy from food, cars source theirs from gasoline. Further, demonstrate how energy is stored and released with the help of simple materials such as rubber bands.

Learn More: How Your Body is Similar to a Car

8. Discover Newton’s Law

With the aid of a string of beads, highlight Newton’s Law of Gravity as the beads are tugged ever so slightly and then begin to fall from the cup.

Learn More: Discover Newton’s Law

9. Egg Drop

Students are encouraged to source material from home that they will use to create a protective barrier for their egg before dropping it to measure the effectiveness of their contraption in preventing their egg from cracking.

Learn More: Egg Drop

10. Static Electricity Science

Discover the science of static electricity in a fun way by building an electroscope to demonstrate the forces of attraction and repulsion!

Learn More: Static Electricity Science

11. Demonstrate Water Erosion

This hands-on, ocean science project is perfect for teaching students about coastal erosion and requires the use of simple materials such as a dish, sand, plastic bottle, stones, and water.

Learn More: Demonstrate Water Erosion

12. Milk Plastic

This unique experiment can lead to hours of crafting fun as 4th grade students learn how to create plastic from milk!

Learn More: Milk Plastic

13. Salt Water Density Experiment

The properties of water and density are highlighted in this science project as children discover that saltwater is denser than normal water.

Learn More: Salt Water Density Experiment

14. Make Unstoppable Bubbles

By combining the traditional soapy bubble mixture with glycerin, students learn about how the original mixture evaporates from stronger bubbles.

Learn More: Make Unpoppable Bubbles

15. Discover More about Blood Components

Biology is an important component of life but should be approached in a fun and simplified manner when working with 4th graders. Discover more about blood components by crafting “blood” model jars!

Learn More: Discover More about Blood Components

16. Could Dominoes knock a Building Over

Discover the effects of chain reactions with the help of this easy science fair project idea before posing the question of whether or not dominos could knock down a building!

Learn More: Could Dominos Knock a Building Over

17. How Neon Signs Work

By making use of a small gas tube in this cool experiment, 4th graders will be intrigued to learn about how neon signs work.

Learn More: How Neon Signs Work

18. Anemometer

Discover wind speed with the help of your very own anemometer! Simple earth science is unveiled with the help of a simple garden contraption made from paper cups, straws, tape, a pencil, and a thumbtack.

Learn More: Anemometer

19. Make Recycled Paper

Although making recycled paper can at times be a process, it is extremely satisfying! Students watch how water is first absorbed by their shredded paper and then, towards the end of the process, how it is drained away- leaving a recycled piece of paper in its place.

Learn More: Make Recycled Paper

20. Nonrenewable Resources

What better way to highlight the depletion of non-renewable resources, than by making use of noodle- mining in a competitive game or project! This hands-on activity is perfect for elementary-age students to use as an earth science project.

Learn More: Nonrenewable Resources

21. Balloon Rocket

This simple, yet fun, activity depicts Newton’s law of motion perfectly. By using household materials such as a balloon, straw, clothespin, and line, your students will discover that for every action, there is an equal or opposite reaction. Ready for blast off!

Learn More: Design Dazzle

22. Cloud Science

With the help of this exciting cloud science project, your 4th grad students will grasp the concept of the water cycle in no time! With the help of a paper cup, plastic zip-top bag, tape, and water students discover how water moves from the ground into the air, then forming clouds before falling back to earth as rain.

Learn More: Cloud Science

23. Blow up a Balloon with Vinegar and Baking Soda

Intrigue 4th grade science students with this experiment that sees balloons magically inflate when baking soda and vinegar combine and generate carbon dioxide.

Learn More: Blow up a Balloon with Vinegar and Baking Soda

24. Cellphone Projector

Not only is this a great science project, but most of the materials used are recycled materials. This simple project is perfect for teaching complex rules such as the refraction of light.

Learn More: Cellphone Projector

25. Create a working elevator 

Students are encouraged to make use of various materials in order to create a working elevator that has a crank and is able to bear a load.

Learn More: Create a Working Elevator

26. Ocean current simulator 

By making use of water, food coloring, an empty dish, and plastic sea creatures, students learn how ocean currents are formed in this simple science project.

Learn More: Ocean Current Simulator

27. Bacteria grower

A simple Agar solution, that has been set in various Petri dishes, is the perfect breeding ground for bacteria. Swab items that the students use on a daily basis and wipe the swab’s on the dishes, then leaving them covered in order to grow and visually depict that bacteria are hiding all around us.

Learn More: Bacteria Grower

28. Wiggle Bot

Craft your very own Wigglebot! Using simple tools and supplies, 4th graders have the opportunity to work with potential energy in a fun manner!

Learn More: Wiggle Bot

29. Crystal names

Make science fun as students grow an edible, crystalized version of their names on pipe cleaners ! This is just one of the many edible science projects out there for kids so be sure to get creative and see what you can make!

Learn More: Crystal Names

30. Capillary Action

Teach the concept of capillary action with this spectacular rainbow glass display! This is a fantastic opportunity for students to learn about color mixing and how water travels.

Learn More: Capillary Action

31. Design a Working Lung Model

Explore more about the natural phenomenon of breath with this cool project. Design a working lung model using a plastic bottle, straws, balloons, sticky tape, and scissors.

Learn More: Kiwi Co

32. Make It Glow

Discover which water mixture will glow using black light to test regular water with highlighter dye, tonic water, and tap water.

Learn More: Cool Science Experiments HQ

33. Explore Tooth Decay

Learn about tooth decay using eggs and an assortment of drinks such as sugar water, soda, and milk. This project is wonderful for visually illustrating the effects of sugar products on teeth.

Learn More: Sciencing

34. Build a Hygrometer

Measure humidity with the help of your very own hygrometer made from a piece of wood and plastic, nails, a dime, glue, tape, a hammer, and a pair of scissors.

Learn More: We Have Kids

35. Discover Osmosis

Learn about osmosis with the help of this fun and colorful gummy bear science project!

Learn More: Homeschool

36. Rotting foods 

This experiment helps to develop thorough observation skills. Reveal which, out of an assortment of foods, will be the first to rot and discover what accelerates the process.

Learn More: No Time for Flash Cards

37. Create a Sundial

Turn back time as you craft an old-fashioned mechanism that helped ancient civilizations such as the Egyptians, Mayans, and Babylonians tell the time.

Learn More: Explorable

38. Make a fossil

Learn how fossils are formed as you leave your mark in a plaster of Paris cast. Consider casting an imprint using a toy to make this activity even more fun!

Learn More: YouTube

39. Build a Rubber Band Guitar

Explore the science of sound as you build a rubber band guitar using a heap of rubber bands and other simple materials.

Learn More: BBC Good Food

40. Make a Water Microscope

Make a microscope to allow you to examine certain objects in greater detail. You’ll need a piece of fuse wire, water and an assortment of objects to look analyze.

Learn More: Science Kids

41. Skittles Spectacular

Roll out the rainbow with this fun project!  Demonstrate the diffusion process to your class using Skittles. This colorful experiment will certainly intrigue your pupils and make them eager to learn more. To carry it out, simply have your kiddies place a few Skittles on a plate and cover them with water before stepping back to watch the reaction that takes place.

Learn More: Rookie Parenting Science

42. Water Wonders: Sink or Float

This idea provides an excellent way to foster a healthy curiosity and understanding of fundamental physics principles. Encourage your students to hypothesize which household items will sink or float, before putting their theories to the test by placing selected items into a basin of water.

43. The Sun-Powered Oven Project

Let your students harness the power of the sun by using a pizza box and transforming it into a solar oven. They can easily harness the sun’s rays by wrapping the box in aluminum foil and other materials to figure out the best way to capture the heat and then get baking. This is an engaging and memorable way to introduce solar energy that’s sweetened by the chance to make and enjoy s’mores!

Learn More: Science Buddies

44. The Journey of a Light-Chasing Plant

Start your lesson with a question: Can plants solve mazes? The concept of phototropism will come alive as your students try to solve this problem by guiding a small plant through a simple cardboard maze toward the light. The result? A thrilling, real-time adventure demonstrating a plant’s instinctual growth response to sunlight that your class will love.

Learn More: Mama Smiles

45. Pinecone Predictions

Challenge your class to be better than the weatherman! Teach your youngsters about humidity and weather changes using a humble pinecone. Simply hang a few cones around the school and prompt your children to observe them; open or closed tells a story about the humidity. They’ll be fascinated to discover how the pinecone’s responses can predict weather conditions.

Learn More: Play to Learn Preschool  

46. Fruit-Powered Fun

You can turn everyday fruits into a source of electricity and marvel with your students as lemons, oranges, or apples light up a bulb or power a digital clock. All you need is a piece of fruit, some wire, and a few nails to engage your learners in a  hands-on project that illustrates the concept of electrical circuits.

Learn More: Kids Activities Blog

47. Shadow Dance

Embark on a day-long shadow-tracking exercise with your students to understand more about the Earth’s rotation. To do so, have them record the changing shadow of a stick at different times throughout the day to visually depict the Earth spinning on its axis. 

Learn More: Inventors of Tomorrow

48. Popsicle Power Play

Allow physics to meet creativity when you encourage your students to construct a catapult out of popsicle sticks and elastic bands. To begin, have them research the best methods for creating the most force. As your kiddos thrill in testing which items the catapult can launch and whose items travel the furthest, they’ll be learning about the concept of potential and kinetic energy transformation.

49. Greenhouse Effect Model

Using jars, thermometers, and plastic wrap, you can simulate the greenhouse effect right in your very own classroom. Provide your students with the necessary materials and instruct them to add the same amount of ice to each jar. Then, have them wrap one jar in plastic and leave the other open before placing them in the sun for a few hours. Lastly, prompt your young scientists to formulate their conclusions after measuring the temperature in each jar. 

Learn More: STEAM Powered Family

50. Pulling with Pulleys

Mechanical advantage and work take center stage in this hands-on activity. By encouraging your young scientists to create a simple pulley system with a spool and string, they can explore mechanical advantage and the concept of work. This hands-on project will help you make complex physics principles that much more observable and fun.

51. Determining Densities

Allow your learners to explore density in a hands-on activity of the senses. As they pour honey, dish soap, water, and oil into a clear container, the differing densities will reveal themselves in a striking visual display.

52. Edible Genetics

Sweets in a classroom seem to have a magical attention-grabbing power. Use this to your advantage when teaching genetics by having your students create an edible DNA model. With colored marshmallows or jelly sweets and toothpicks, they’ll come to understand the double helix structure in a fun, tasty way.

Learn More: Hess UnAcademy

53. The Rainfall Recorder

This is an easy project that introduces practical meteorological skills and fosters scientific curiosity. Empower your students to measure rainfall and track this over time with a homemade rain gauge. Use an empty bottle with the top cut off and then instruct your class to carefully fill the bottle in 20 ml increments; carefully marking the lines to ensure accuracy. 

54. Magnetism Unveiled

Reveal the hidden world of magnetic fields to your students by engaging them in a project that uses a bar magnet and iron filings. They can simply lay the magnet under a piece of thin card stock and sprinkle the filings over the card. The result is a practical way for your budding scientists to visualize the unseen forces of magnetism; fostering a deeper understanding of this fundamental physical phenomenon.

55. Miniature Volcanic Eruption

Unleash the dramatic spectacle of a volcanic eruption in your classroom. Have your kiddos create a volcanic mountain with a cup in the center. Add baking soda to the cup and then slowly pour in the vinegar; resulting in a chemical reaction that will blow your young scientists’ minds. 

56. Invisible Ink Adventures

Introduce your students to the secret world of invisible ink with lemon juice. Get ready by preparing lemon juice, a brush or cotton swab, white paper, and a heat source. Ask your students to dip their brushes in lemon juice and use them to write or draw on the piece of paper. Then, help them carefully heat the piece of paper with a light bulb or iron to the secret message. It’s a playful way to learn about acidic and basic properties and will allow your young investigators to reveal hidden messages just like detectives.

57. Oil Spill Cleanup Challenge

Conduct an environmental experiment with your class by simulating an oil spill using feathers, oil, and various cleaning materials. To a shallow tray, add water before scattering a few small feathers and then slowly spilling the oil into it. Once they’ve had the chance to marvel at the unique patterns that the different liquid densities create,  challenge them to solve the problem of removing the oil. This hands-on activity will emphasize the impact of pollution on the environment; helping you spark thought-provoking discussions about conservation and responsibility.

Learn More: Super Teacher Worksheets

The activities we’ve provided are perfectly adaptable and may be employed in individual, pair, or group settings. Be inspired to design creative classes with the help of our comprehensive list of science projects above. We strive to make learning fun whilst still highlighting the key concepts of science in a simplified manner.

Frequently Asked Questions

Why is science important for 4th graders.

Science-based learning at an elementary level introduces students to a STEM-based classroom focus and opens them up to STEM-related careers at a young age. Students discover key concepts about the world around them- unveiling properties of water, electrical currents, animals, ocean currents and so much more along the way!

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50 Fun Kids Science Experiments

Science doesn’t need to be complicated. These easy science experiments below are awesome for kids! They are visually stimulating, hands-on, and sensory-rich, making them fun to do and perfect for teaching simple science concepts at home or in the classroom.

Top 10 Science Experiments

Click on the titles below for the full supplies list and easy step-by-step instructions. Have fun trying these experiments at home or in the classroom, or even use them for your next science fair project!

Baking Soda Balloon Experiment

Can you make a balloon inflate on its own? Grab a few basic kitchen ingredients and test them out! Try amazing chemistry for kids at your fingertips.

Rainbow In A Jar

Enjoy learning about the basics of color mixing up to the density of liquids with this simple water density experiment . There are even more ways to explore rainbows here with walking water, prisms, and more.

This color-changing magic milk experiment will explode your dish with color. Add dish soap and food coloring to milk for cool chemistry!

Seed Germination Experiment

Not all kids’ science experiments involve chemical reactions. Watch how a seed grows , which provides a window into the amazing field of biology .

Egg Vinegar Experiment

One of our favorite science experiments is a naked egg or rubber egg experiment . Can you make your egg bounce? What happened to the shell?

Dancing Corn

Find out how to make corn dance with this easy experiment. Also, check out our dancing raisins and dancing cranberries.

Grow Crystals

Growing borax crystals is easy and a great way to learn about solutions. You could also grow sugar crystals , eggshell geodes , or salt crystals .

Lava Lamp Experiment

It is great for learning about what happens when you mix oil and water. a homemade lava lamp is a cool science experiment kids will want to do repeatedly!

Skittles Experiment

Who doesn’t like doing science with candy? Try this classic Skittles science experiment and explore why the colors don’t mix when added to water.

Lemon Volcano

Watch your kids’ faces light up, and their eyes widen when you test out cool chemistry with a lemon volcano using common household items, baking soda, and vinegar.

Bonus! Popsicle Stick Catapult

Kid tested, STEM approved! Making a popsicle stick catapult is a fantastic way to dive into hands-on physics and engineering.

Grab the handy Top 10 Science Experiments list here!

Free Science Ideas Guide

Grab this free science experiments challenge calendar and have fun with science right away. Use the clickable links to see how to set up each science project.

Get Started With A Science Fair Project

💡Want to turn one of these fun and easy science experiments into a science fair project? Then, you will want to check out these helpful resources.

• Easy Science Fair Projects
• Science Project Tips From A Teacher
• Science Fair Board Ideas

Easy Science Experiments For Kids

Science Experiments By Topic

Are you looking for a specific topic? Check out these additional resources below. Each topic includes easy-to-understand information, everyday examples, and additional hands-on activities and experiments.

• Chemistry Experiments
• Physics Experiments
• Chemical Reaction Experiments
• Candy Experiments
• Plant Experiments
• Kitchen Science
• Water Experiments
• Baking Soda Experiments
• States Of Matter Experiments
• Physical Change Experiments
• Chemical Change Experiments
• Surface Tension Experiments
• Capillary Action Experiments
• Weather Science Projects
• Geology Science Projects
• Space Activities
• Simple Machines
• Static Electricity
• Potential and Kinetic Energy
• Gravity Experiments
• Magnet Activities
• Light Experiments

Science Experiments By Season

• Spring Science
• Summer Science Experiments
• Fall Science Experiments
• Winter Science Experiments

Science Experiments by Age Group

While many experiments can be performed by various age groups, the best science experiments for specific age groups are listed below.

• Science for Toddlers
• Science for Preschoolers
• Science for Kindergarten
• Elementary Science by Season
• Science for 1st Grade
• Science for 2nd Grade
• Science for 3rd Grade
• Science for 4th Grade
• S cience for 5th Grade
• Science for 6th Grade
• Science for Middle School

How To Teach Science

Kids are curious and always looking to explore, discover, check out, and experiment to discover why things do what they do, move as they move, or change as they change! My son is now 13, and we started with simple science activities around three years of age with simple baking soda science.

Here are great tips for making science experiments enjoyable at home or in the classroom.

Safety first: Always prioritize safety. Use kid-friendly materials, supervise the experiments, and handle potentially hazardous substances yourself.

Start with simple experiments: Begin with basic experiments (find tons below) that require minimal setup and materials, gradually increasing complexity as kids gain confidence.

Use everyday items: Utilize common household items like vinegar and baking soda , food coloring, or balloons to make the experiments accessible and cost-effective.

Hands-on approach: Encourage kids to actively participate in the experiments rather than just observing. Let them touch, mix, and check out reactions up close.

Make predictions: Ask kids to predict the outcome before starting an experiment. This stimulates critical thinking and introduces the concept of hypothesis and the scientific method.

Record observations: Have a science journal or notebook where kids can record their observations, draw pictures, and write down their thoughts. Learn more about observing in science. We also have many printable science worksheets .

Theme-based experiments: Organize experiments around a theme, such as water , air , magnets , or plants . Even holidays and seasons make fun themes!

Kitchen science : Perform experiments in the kitchen, such as making ice cream using salt and ice or learning about density by layering different liquids.

Create a science lab: Set up a dedicated space for science experiments, and let kids decorate it with science-themed posters and drawings.

Outdoor experiments: Take some experiments outside to explore nature, study bugs, or learn about plants and soil.

DIY science kits: Prepare science experiment kits with labeled containers and ingredients, making it easy for kids to conduct experiments independently. Check out our DIY science list and STEM kits.

Make it a group effort: Group experiments can be more fun, allowing kids to learn together and share their excitement. Most of our science activities are classroom friendly!

Science shows or documentaries: Watch age-appropriate science shows or documentaries to introduce kids to scientific concepts entertainingly. Hello Bill Nye and the Magic Schoolbus! You can also check out National Geographic, the Discovery Channel, and NASA!

Ask open-ended questions: Encourage critical thinking by asking open-ended questions that prompt kids to think deeper about what they are experiencing.

Celebrate successes: Praise kids for their efforts and discoveries, no matter how small, to foster a positive attitude towards science and learning.

What is the Scientific Method for Kids?

The scientific method is a way scientists figure out how things work. First, they ask a question about something they want to know. Then, they research to learn what’s already known about it. After that, they make a prediction called a hypothesis.

Next comes the fun part – they test their hypothesis by doing experiments. They carefully observe what happens during the experiments and write down all the details. Learn more about variables in experiments here.

Once they finish their experiments, they look at the results and decide if their hypothesis is right or wrong. If it’s wrong, they devise a new hypothesis and try again. If it’s right, they share their findings with others. That’s how scientists learn new things and make our world better!

Go ahead and introduce the scientific method and get kids started recording their observations and making conclusions. Read more about the scientific method for kids .

Engineering and STEM Projects For Kids

STEM activities include science, technology, engineering, and mathematics. In addition to our kids’ science experiments, we have lots of fun STEM activities for you to try. Check out these STEM ideas below.

• Building Activities
• Self-Propelling Car Projects
• Engineering Projects For Kids
• What Is Engineering For Kids?
• Lego STEM Ideas
• LEGO Engineering Activities
• STEM Activities For Toddlers
• STEM Worksheets
• Easy STEM Activities For Elementary
• Quick STEM Challenges
• Easy STEM Activities With Paper  

Printable Science Projects For Kids

If you’re looking to grab all of our printable science projects in one convenient place plus exclusive worksheets and bonuses like a STEAM Project pack, our Science Project Pack is what you need! Over 300+ Pages!

• 90+ classic science activities  with journal pages, supply lists, set up and process, and science information.  NEW! Activity-specific observation pages!
• Best science practices posters  and our original science method process folders for extra alternatives!
• Be a Collector activities pack  introduces kids to the world of making collections through the eyes of a scientist. What will they collect first?
• Know the Words Science vocabulary pack  includes flashcards, crosswords, and word searches that illuminate keywords in the experiments!
• My science journal writing prompts  explore what it means to be a scientist!!
• Bonus STEAM Project Pack:  Art meets science with doable projects!
• Bonus Quick Grab Packs for Biology, Earth Science, Chemistry, and Physics

Subscribe to receive a free 5-Day STEM Challenge Guide

~ projects to try now ~.

• Activities for Kids

49 Science Experiments for Kids to Try at Home

Looking for science experiments for kids? Thanks to common household ingredients, some ingenuity, and our guide, these at-home science experiments for kids make any day exciting. To help you prepare, we’ve rated each experiment from one to five sponges so you know the messiness factor ahead of time. If you’re looking for seasonal projects, check out these water-themed science experiments . Or how about a few science projects for kids that are perfect for the backyard ?

TIP: Did you know there are a ton of awesome science kits and subscription boxes that will further develop your child’s love of science? KiwiCrate is one of our favorite ed-tech companies, as they offer seriously fun & enriching science & art projects, for kids 0 months up to 13+.

Classic Science Experiments for Kids

Potato battery science experiment.

A lesson in: Chemical to electrical energy

When these nails and copper wires collide, heat is generated (psst ... heat is a result of expended energy, so you can explain to your little runner why he feels warmer after a race around the house). But with some potato magic, the properties of the nail and copper stay separated, allowing the heat to become the electric energy needed to power up your devices. Build your own potato battery with this tutorial from Wiki How .

Messiness factor: One sponge

Make a Baking Soda & Vinegar "Steam" Powered Boat

A lesson in: Chemical reactions

Sure, anyone can do the old baking soda and vinegar volcano, but what about creating a boat that is propelled by this classic chemical reaction ? Keep your little Einsteins busy this afternoon with this cool science project for kids that doesn't require a lot of prep. 

Messiness factor: Three sponges

Make Water Float

A lesson in: Air pressure

Can you make water float? We bet you can. No, you don’t need to be a wizard or a witch. You don’t need to cast a spell. There’s nothing magic about it at all, in fact. You can make water float using science. The “trick” to this experiment is air pressure. Get everything you need and the how-to, right here , thanks to Mike Adamick and his book, Dad's Book of Awesome Science Experiments .

Messiness factor: Two sponges

Photo by Mike Adamick. Copyright © 2014 F+W Media, Inc. Used by permission of the publisher. All rights reserved.

Germ Testing Science Project for Kids

A lesson in: Germs

This germ-growing science project for kids will help them understand how even the cleanest-looking surfaces (and hands) can be filled with germs, is one of the easiest science experiments for kids we've found. Get the fun and yucky instructions at Kids Activity Blog .

Make an Edible Water Bottle

View this post on Instagram A post shared by Zar🐴 🦜Travel Fun (@chasing_ice88)

A lesson in: Chemistry and specifically, spherification.

This futuristic science experiment will leave your kids wanting to know more about chemistry. Quench her thirst for knowledge when you create an edible membrane around teaspoons of water to make these handy water “bottles.” The tutorial is in video form over at Inhabitat.  Trust us, it’s as cool as it looks!

Messiness factor: One sponge.

Make Crystal Egg Geodes

View this post on Instagram A post shared by STEM Girls | Fun Learning STEM (@brownstemgirls)

A lesson in: Molecular bonding and chemistry.

This grow-your-own experiment lets you grow crystals inside an eggshell. Be sure to get alum powder that contains potassium, or else you won’t get any crystal growth. Adding drops of food dye to the growing solution yields some super cool crystals. A perfectly formed geode takes about 12-15 hours to grow, making this a great weekend project. Get the tutorial for this science experiment for kids at Art and Soul.

Messiness factor: Four sponges.

Check the Iron in Breakfast Cereal

View this post on Instagram A post shared by Kimberly Scott (@kimberlyscottscience)

A lesson in: Magnetism.

You’ve probably seen the label that says “fortified with iron” on your cereal box, but how much iron is actually in your cereal? Is there enough to cause a magnetic reaction? This super easy experiment doesn’t require too many fancy ingredients (cereal + magnet) which means you and the kiddos can try it right away. The results may surprise you! Get the how-to at Rookie Parenting and get started!

Messiness Factor: Two sponges.

Learn About Shooting Stars

A lesson in: Astronomy

With this fun video from They Might Be Giants , kids can learn that shooting stars are not stars, they're meteorites. Then, take it out back for a fun backyard stargazing session. We love this science experiment you can do at home! 

Messiness Factor: One sponge

Related:  14 Backyard Science Experiments for Kids

Marshmallow Tower

A lesson in: Engineering

Using only marshmallows and dry spaghetti noodles, kids can experiment with structure, stability, and weight distribution. Get the instructions from Kesler Science by clicking here.  

Messiness factor : 1 sponge

Paper Airplane Science

A lesson in: Aerodynamics

By making various paper airplanes , your scientists can test the drag of each plane, which will have an effect on how far they fly. Get more info on this science project for kids here .

Messiness factor: 1 sponge

Walk on Eggs

A lesson in: Weight distribution

How can you walk on eggs without breaking them? Steve Spengler shows us how and teaches an awesome lesson on how an egg’s unique shape gives it tremendous strength, despite its seeming fragility. Check out this easy science experiment for kids to get started.

Messiness factor: 1-3 sponges, depending on the state of the eggs in the end!

A Lesson in: Molecules

Fill a shallow dish with milk, drop food coloring, and make sure the drops don't touch. Then, dip a cotton swab in dish soap and place it in the middle of the dish. The colors will begin to swirl and seem as though they are moving on their own! Explain to your kids that the soap reduces surface tension and makes the fat molecules in the milk move. Click here for more science experiments that use food coloring.

Messiness Factor: 2 sponges

Professor Egghead's Lesson about Light

A Lesson in : Light

Learn all about the sun and what it gives humans (think energy and warmth!) You'll also do an experiment to learn about different kinds of light, even ultraviolet rays. Get the video from Professor Egghead here.  

Messiness factor: 1 sponge 

Cup Amplifier

A lesson in: Sound

Slide a mobile phone into this low-tech amplifier and the result will be music to your ears. The audio is deeper, richer, and louder, thanks to the science of sound waves and the natural amplification created by the cone-shaped cups. If the two cups look a bit like the attentive ears of a cat or fox, that’s no coincidence. Animal ears use the same science, but in reverse: they help creatures hear by gathering sound waves and directing them into the ear. For engineers, that’s a design worth copying.

Customize your amplifier to fit any size phone!

Tabs cut all around the hold make it easy to glue the cardboard tube in place.

Cut a slot with a flap to support your phone.

What’s Going On The Cup Amplifier focuses and projects sound waves, in the same way that a cheerleader’s megaphone (or even just your cupped hands) amplifies your voice. Once sound waves are created, they want to spread out in all directions. The amplifier directs them from your phone’s speakers into the cardboard cups, where, instead of scattering, they are gathered and channeled in one direction—out the openings.

Excerpted from  Cardboard Box Engineering  © 2020 by Jonathan Adolph. Used with permission from Storey Publishing.

Skittles Science

A Lesson in: Stratification

A great way to get rid of extra candy, this easy science experiment for kids uses Skittles and whatever liquids you want to use. The idea is, the candy is made of ingredients that dissolve, so kids get a chance to guess which liquid will make the Skittles dissolve the fastest. Get more info over at Little Bins for Little Hands . 

Find Out How Many Water Drops Fit on a Coin

A Lesson in: Chemistry

An easy science experiment to do at home is one that helps kids find out what affects the surface tension of water! You'll need basic materials like a penny and a water dropper, and be sure to make a hypothesis before you start. You might be surprised! Get the tutorial from Rookie Parenting . 

Pulley Experiment

A Lesson in: Physics

This simple experiment requires a trip to the hardware store, but putting it all together is a cinch. Once you've completed the system, have your kids pick up different-sized rocks and make a note about how difficult it is. Then, try with the pulley. Is it easier or is it harder? To find out how to make your pulley, and for other questions to ask your kids, head over to Little Bins for Little Hands . 

Make a Volcano Explode

A Lesson in: Chemical reactions

There's a reason why this science experiment is so popular. When the solid baking soda (sodium bicarbonate—a base) mixes with the liquid vinegar (acetic acid—a weak acid), it creates a gas—carbon dioxide! Besides the chemical reaction, kids enjoy making the actual volcano, whether it's out of clay, mud, or foam sheets. Get a great step-by-step tutorial from The Dad’s Book of Awesome Science Experiments by clicking here . 

Messiness Factor: Four sponges

Bake Hygroscopic Cookies

A Lesson in: Hygroscopy. 

This simple science experiment is best when you check in on it the next morning. Bake up a batch of cookies, then place them in an airtight container with a piece of fresh bread. Watch as the cookies stay straight-from-the-oven soft thanks to the moisture of the bread (The sugar in the cookies is hygroscopic, which means it absorbs water molecules out of the bread). The best part? Getting to eat the cookies!

The Juice-Tasting Challenge

A lesson in : Taste buds and olfactory senses.

Tummy’s rumbling–it’s time to eat! Did you know that you “eat” with your nose and eyes as well as your mouth? It’s true. Put your family’s sense of smell and sight to the test with this juice-guessing game.

You’ll Need: Masking tape 4 glasses Pen and paper 4 flavors of juice 4 food colorings

How to: 1. Stack a piece of tape on the bottom of each glass and number them one to four, making sure your partner can’t see the numbers. Pour one type of juice into each glass.

2. Send your partner out of the room. Drip a different food coloring into each juice and stir so your partner can’t recognize the juice by its color alone. Record the number, juice type, and color in each glass on a piece of paper.

3. Call your partner back. Tell her to hold her nose, sip from each glass, and guess the juice If she’s like most people, she’ll be kind of confused–her eyes and tongue give her two conflicting flavor messages.

4. Ask her to unplug her nose, close her eyes, and sniff the juice before drinking it. Her guesses should be on target now. All hail the mighty schnoz!

Reprinted from  Exploralab: 150+ Ways to Investigate the Amazing Science All Around You . 

Messiness factor: One sponge. 

Experiment with Tie Dye

A lesson in: Chemistry.

Dyes are fiber reactive, so there's a chemical reaction between the dye and the fabric. You can do this experiment with everything from paper to t-shirts. We've got a great list of tie-dye projects here . 

Messiness Factor : Five sponges.

Make a Sundial

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Unravel the mysteries of time. Or at least figure out the basics by setting up a sundial outside . Take time each hour to check the sun’s positioning and make note of it so your sidekick can see the bigger picture.

Messiness Factor : One sponge

Dry Ice Bubbles

A lesson in: Gas.

Dry ice is already cool enough on its own, but it takes science to turn them into bubbles. When you add water, it changes the temperature of the dry ice, causing the ice to go from solid to gas. That’s where the fog and bubbles come from! Head to Simply Modern Mom to get the full tutorial. But be careful: Dry ice can cause serious skin burns, so make sure your kids are well-supervised and know not to touch the ice.

Messiness factor: Three sponges.

Invisible Licorice

A lesson in : Light and perspective.

Did the candy melt or disappear? Your sweetums might think it’s magic, but it’s really all about how oil redirects light, causing half the candy to disappear! Click here for the instructions on how to recreate this mind-warping experiment.

Egg in a Bottle

Your whistler has the basics of air pressure down just by using their mouth to blow. And now you can amaze them with this science experiment for kids. There is a little fire play involved (dropping a lit paper into the bottle), but that’s what causes the unbalanced air pressure, which pushes the egg into the bottle. Want to test it out? Head over to Steve Spangler Science for the tutorial.

Invisible Ink

A lesson in: Oxidation.

If your snacker has noticed how their apples have turned brown after being left out for too long, then they’ve seen oxidization in action (loss of electrons and nutrients when in contact with oxygen). Fortunately, lemon juice only oxidizes when in contact with heat. This method works with baking soda and milk too. Click here to find out how to write secret messages with your little spy.

Kid-Safe Lava Lamps

A lesson in: Density and intermolecular polarity.

These sound like big words for our little ones, but there’s an easier way to break it down. Water and oil won’t mix because they’re not the same “weight” or substance (just like clay and LEGOs won’t become one). Now add a drop of food coloring (which is heavier than oil) and a fizzy tablet and watch the air bubbles take coloring with them to the top. Head on over to S. L. Smith’s blog to see how it’s done .

Messiness factor: Two sponges.

A Lesson in: Crystallization.

Be careful: The water only has the power to make the sugar crystals “invisible” when it’s piping hot. After the water cools down and evaporates, the sugar turns back into a solid. And with a little help of your sugar-soaked string, the crystals will find a home to grow upon and become rock candy. Learn how to make your smart sweets with these instructions from the Exploratorium .  

S'more Solar Oven

A lesson in: Solar power.

Harness the power of the sun to make your favorite campfire treat! With just a few common household items you can create an  eco-friendly oven  just for melting marshmallows and chocolate, plus you can teach kids about the power of the sun. Click  here  to learn how.

Homemade Slime

A lesson in: Polymers.

Is it a liquid or solid? The answer is both! This DIY slime—made from glue, borax, and water—is also known as a polymer (molecules that can stick close together to be a solid or spread apart and take liquid form). And it’s all thanks to borax, which acts as a binder to prevent the glue from going completely liquid. Check out Explorable’s recipe for mixing the ingredients . Prolong the life of your goo by keeping it in an airtight container in the fridge. And, if you need help with cleanup, check out our guide for how to get slime out of clothes, couches, and hair . 

Make Fizzy Lemonade

Plain old fresh-squeezed lemonade is so last year. Boost the fun quotient and learn a simple science concept simultaneously when you recreate this edible Fizzy Lemonade drink from  Learn With Play at Home . It’s super easy to mix and little sippers report it’s pretty tickly too. A great alternative to the baking soda-vinegar volcano, it shows kids what happens when an acid and base are mixed together. 

Whirlpool in a Bottle

A lesson in: physics, weather science. 

This easy little experiment doesn't take much: just two empty and clear 2-liter bottles, a metal washer, water and duct tape. Food coloring is optional. Fill one bottle with about two-thirds water. Place the washer on the bottle and line up the empty bottle on top of the water-filled one. Wrap the duct tape around the middle securing the two bottles together. Then, turn the bottles upside down. Does the water go straight down or do you see a mini whirlpool (Swirl the top or bottom a bit for a better effect.)? The spinning water is called a vortex, and all tornadoes, hurricanes and typhoons are examples of air vortexes. Since you’re using water, this is an example of a whirlpool. As the water spins faster, it pushes to the outside of the bottle creating a hole in the middle. The air from the bottom of the bottle comes up the middle and the water from the top flows back down through the hole.

Messiness factor : Two sponges.

Salt Crystal Feathers

A lesson in: Evaporation

You’ve probably tried a salt crystal growing kit at some point in your life (5th grade Science Fair perhaps?) but Schooling a Monkey takes the idea to a new level with these Salt Crystal Feathers. This awe-inspiring project is deceptively simple and inexpensive to achieve, and requires just a wee bit of patience to see the results—kids will love checking in on the progress. 

Soda Blasting Experiment

A lesson in: Chemistry, pressure, and release of pressure

This experiment is one you'll definitely want to do outside. Step it up with this Mentos + soda experiment: head to Steve Spangler  for all the need-to-know details on this engaging experiment. 

Messiness factor: Three (very epic) sponges

Melting Rates

A lesson in: Solar science and absorption

Different colors have different heat-absorbing capacities. Black has the greatest heat-absorbing capacity, which results in ice melting quicker than white, which reflects the most light. Learn how to observe and report on which colors affect ice’s melting rates here on Curiodyssey.  Get more sidewalk science ideas here .

Make Elephant Toothpaste

A lesson in:  Chemistry and the exothermic process <<<impress your kids! 

If you’ve ever wondered how elephants keep their tusks clean, we’ve got the answer. They use elephant toothpaste! Find out how to mix your own and figure out the science behind this dynamic exothermic (heat-releasing) reaction from Fun at Home With Kids . Our favorite part? That you get to throw in some sensory playtime after the action’s over.

Messiness factor:  Three sponges. Maybe four. 

Bending Water with a Comb

A lesson in: Electrical currents and static electricity

This  static electricity science experiment couldn't be any easier. In fact, other than a balloon or going down the slide, it might be the easiest way to teach kids about electrical currents. And, you can impress them with your wizarding skills once before you reveal the science behind it. Click here to get the step-by-step. 

Regrow Leftovers

A lesson in : Photosynthesis and plant science.

Insert a little plant science into the mix by re-growing food from scraps. Think onions, potatoes, and lettuce for this one ( psst… green onions are a super easy, fast option). Get the low down on all that recycled goodness at Mrs. Happy Homemaker . Since plants need water and sunlight to grow, exposing scrap roots to that winning combo helps them recharge.

Messiness factor:  Two sponges.

Turning Pennies Green

A lesson in: Chemical reactions.

It happens to the Statue of Liberty and it happens to the change in your pocket! Create your own home lab with just a few household ingredients (this experiment will literally cost you just pennies). It’s also a chemical reaction with very non-toxic ingredients, so it’s safe and fascinating even for young kids. Click over to Buggy and Buddy to get the simple how-to.

Film Canister Rocket

A lesson in: Rocket science.

Like the popular baking soda and vinegar experiments, this film canister rocket literally takes it to the next level by using that creation of gas and energy to jet off into the sky. If your explorer has seen videos of mountain tops getting blown off during a volcanic eruption, this science project is pretty much any space lover’s version. Get the building instructions over at The Science Kiddo .

Disappearing Egg Shell

Can you and the kiddos solve the mysterious case of the disappearing eggshell? Following the simple how-to at Go Science Kids , you’ll learn the step-by-step and talking points about the process along the way. Warning! Although it’s totally non-toxic, toddler-aged kids will be tempted to squeeze the egg at the end so make sure it’s a supervised experiment. Visit Go Science Kids to get cracking!

Fishing for Ice

A lesson in: Freezing/temperature.

Children living in snow-covered cities might witness their neighbors salting the driveway. Well, while that is definitely not for fun, this experiment is. Salt lowers the freezing point of ice so it melts, but it won’t be able to freeze unless it’s cold enough. See how The Science Kiddo made a clever game with this knowledge.

A lesson in: How clouds hold water.

Let your imagineers pretend shaving cream is a cloud that holds colorful raindrops. As they squeeze more and more food coloring, their “cloud” will soon release the excess below—just like how real clouds get too heavy and let the rain loose on a gloomy day. Learn how to re-create this weather experiment here .

Dyed Plants

A lesson in: Capillary action.

Find out how plants “drink” water with some food coloring . Use carnations, roses, or stalks of celery submerged in the colored water and watch the liquid slowly seep through the plant’s “veins” and towards the leaves. Keep an eye out -- you could have a very colorful bouquet just after the first day. Get the rundown by Dad’s Book of Awesome Science Experiments  over  here .

Dancing Oobleck

A lesson in: Sound waves.

The word “oobleck” comes from a Dr. Seuss story where a young boy must rescue his kingdom from a sticky substance. But the neat part of this experiment is how oobleck reacts to vibrations. Put the oobleck over a subwoofer (on top of a cookie sheet!) and watch it dance to different frequencies. Your dancer will see how sound isn’t just about volume! Check out more of this awesome experiment from Tammy of Housing a Forest .

Messiness factor: Five sponges.

Homemade Lightning

A lesson in: Static electricity. (Or weather science.)

Lightning is essentially electrons moving uber fast between the sky and the earth—and with a few simple materials, you can use homemade static electricity (the reason behind your hair sticking up when you rub a balloon or go through a tunnel slide super fast) for DIY lightning. Figure out how to recreate a family-friendly version of this spark by visiting the activity blog Learn Play Imagine .

Make a Bug Vacuum

A Lesson in: Entomology

Scientists capture bugs for study using a mouth-powered vacuum, called an aspirator or a pooter. Kids can make their own version from a mason jar, then use it to gather ants (or other small insects) and observe them in action.

What you'll need: Pint-size mason jar with a two-piece lid Milk or juice carton Hole punch 2 bendy straws Tape Gauze pad

How to:  1. Open the milk carton along the seams and flatten it out. Use the inner lid of the mason jar as a template to trace a circle on the carton. Cut out the circle and punch two holes in the center about an inch apart.

2. Carefully slide the short ends of the bendy straws into the holes. Tape a piece of gauze pad around the end of one straw to prevent any bugs from getting sucked up.

3 Set the lid on the jar and fasten it in place with the ring.

4. To use your pooter, place the tip of the straw without the gauze near a bug. Put your mouth on the straw with the gauze, and gently suck in. The bug should travel up the straw and land unharmed at the bottom of the jar.

Take It Further Capture some ants in your bug vacuum, then use a magnifying glass to observe these remarkable insects up close. Open the jar and feed them a few drops of sugary water or corn syrup, or try giving them some birdseed. Ants live in colonies headed by a queen ant, and they can’t last long on their own. When you are done observing them, release your ants where you found them. (Note: Some ants bite, so be careful handling them.)

Tell Me More Ants were the Earth’s first farmers. For millions of years, certain species have been creating underground gardens where they grow their favorite fungus for food. They tend to their crops, bringing them water and even weeding out other fungi they don’t want.

Excerpted from Mason Jar Science © by Jonathan Adolph, used with permission from Storey Publishing . Available online , $12.69.

Messiness Factor : One sponge. 

A Smell Challenge

A Lesson in: Olfactory senses.

Teach kids the importance of smell with this activity that asks them to use only their noses to identify objects. Can they sniff out the fish oil over the garlic cloves? The lemon juice over the orange oil? Homeschooling blogger Ana has the instructions at Babble Dabble Do .

Is This Soluble?

A Lesson in: Mixtures 

Teaching children chemistry can become a fun, at-home activity as a weekend afternoon project or as part of their remote learning curriculum. One of the best experiments you can do is the mixing activity. With this exercise, children will learn the difference between soluble and insoluble substances. Do not worry! You can do it with ingredients you already have in your kitchen!

Ingredients

• Oil (cooking oil, vegetable oil, olive oil, etc.)
• Food Coloring
• Transparent containers with a lid or transparent cups with a spoon to mix

Before you begin the activity, ask the children what each ingredient is—whether it is a solid, liquid, or gas—and what they think will happen when you begin mixing them. This guarantees a hands-on experiment that will allow the children to feel they are in control.

• Mix the water and the sand. Children will notice there is a separation between both ingredients and that layers have formed, so it is an insoluble reaction.
• Mix the water and the food coloring. Children will see them combine—the water turning into that color—and know it is a soluble reaction.
• Mix the water and the table salt. The salt will disappear in the water, making it another soluble reaction.
• Mix the water and the oil. This time, a clear layer will be formed, showing another insoluble reaction.

After these mixing activities, you can further this experiment by letting the children find other ingredients to mix with water and have them determine if that substance is soluble or insoluble. The main goal is to show them different reactions and layers.

For a clear example of this experiment, check out this video .

Messiness factor: 2 sponges 

Experiment courtesy of Dr. Stephanie Ryan. See more fun about science over at letslearnaboutscience.com

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Year 4 Science

Practise the concepts your child is investigating in school with our Year 4 science worksheets and help them develop their skills of ‘scientific enquiry’ (examining ideas and evidence , using investigative techniques and drawing conclusions based on evidence ).

You’ll find lots of hands-on activities to help your child grasp core topics, such as humans, other animals and plants , properties of materials , electricity and forces.

Plus, for a complete course in Year 4 science, check out our fantastic Year 4 Science Learning Journey programme.

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Experiments and science fun.

Play a game of Blow Football, make your own mini-me, turn white petals multi-coloured and dissolve an egg... all in the pursuits of science. Prepared exclusively for TheSchoolRun by Emma Vanstone of children's science blog Science Sparks, Experiments and science fun for KS1 and KS2 will help you make primary science memorable and fun. You won't need any special equipment or knowledge to get started; before you know it the kids will be planning investigations, experimenting with supersaturated solutions and germinating beans on the window sill.

Year 4 Science Learning Journey

Discover a complete learning programme that covers all the core science skills that your child must master by the end of Year 4. This comprehensive programme enables you to cover every topic in the curriculum with just one 10-minute worksheet every week at home. Get started on the Year 4 Science Learning Journey and by doing just a few minutes of fun work each week with your child at home, you will inspire their learning, fire up their hunger for knowledge… and ensure they’re not only on top of their lessons but brimming over with facts and actively contributing to classes.  

Even more science fun at home!

In Year 4 science your child will learn about a range of physical processes  such as forces and the different states of matter . Support learning at home on these topics with fun worksheets:

• Temperature and heat
• What is friction?
• Thermal insulators and thermal conductors
• Circuits and conductors
• Solids liquids and gases

Homework Gnome – for all your topic homework

In Year 4, your child will cover some core learning areas of science. For many of these topic-areas, you'll find top facts, timelines, did you knows, pictures, videos and more, in the Homework Gnome. Why not check out the following: Food chains Electricity and power generation Water and the water cycle  

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Science Experiments Teaching Resources for Year 4

• Teaching Resource 76
• Lesson Plan 25
• Unit Plan 1
• Inquiry Based Learning Activities 29
• Worksheets 28
• Teaching Slides 5
• Classroom Posters 4
• Fact Sheets 3
• Templates 3
• Mini Books 2
• Task Cards 1
• Matching Games 1
• Word Walls 1
• Graphic Organiser 1
• Preschool / Kindergarten 2
• Foundation Year 16

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Heat Conductors Science Experiment (Feel the Heat)

Investigate heat conductors with your students using this engaging science experiment.

Heat Insulators Science Experiment (Keeping Out the Heat)

Investigate heat insulators with your students using this engaging science experiment.

What is a Fair Test? - Middle Years PowerPoint

A 17 slide PowerPoint to use when teaching your students about how to make a fair test in Science.

Environmental Impact Science Experiments

Use these simple science experiments to teach your students about environmental issues such as oil and water pollution, soil quality and climate change.

Making Scientific Observations Worksheets

Use this set of two worksheets to help your students record their own scientific observations during science experiments and projects.

Friction Experiment – Sticky Friction

Use this engaging friction experiment when teaching your students about sliding friction and the effect it has on the movement of objects.

Rain Cloud in a Jar Experiment

Use this science experiment when learning about the different types and features of clouds and how they contribute to the water cycle.

Design Your Own Fair Test Worksheet - Middle Years

A worksheet to use when developing the concept of a fair test.

Forms of Energy – Year 4 Science Experiments for Kids

Investigate mechanical, electrical, light, thermal and sound energy with this set of science activities for kids.

Does the Sun Transfer Heat? – Science Experiment

Discover how the sun transfers thermal energy and which objects absorb more heat with this science experiment for kids.

Buoyancy Experiment – Sink or Swim

Use this practical float or sink science experiment when teaching your students about why some objects float in water while others sink.

Science Experiment Recording Sheet

A recording sheet to use when completing a Science experiment.

Bean Growth Experiment

“Grow” your students’ knowledge of plant life cycles with a plant growth experiment.

Scientific Investigation Process – Posters

A set of posters covering the scientific investigation process.

Science Experiment - Lights Line Up!

A science experiment which explores light.

Science Experiment - Changing Shadows

Explore how shadows change throughout the day with this hands-on science experiment.

Air Resistance Force Investigation

Use this engaging air resistance force experiment when teaching your students about air friction and the effect it has on the effectiveness of a parachute.

Balloon Car Experiment – Speed Racer

Use this hands-on balloon car experiment when teaching your Year 4 students about thrust force and its effect on the speed of objects.

Science Experiment - Suck It Up!

A science experiment which investigates the absorptive properties of various materials.

Initiating a Scientific Investigation Worksheet

A worksheet to help the students begin the process of a scientific investigation.

Force and Motion Experiment – Throwing, Dropping, Bouncing, Rolling

Use this hands-on force and motion experiment when teaching your students about how forces influence the movement of objects.

R.E.R.U.N. - Writing a Scientific Conclusion Fact Sheet

An educational fact sheet introducing the students to the R.E.R.U.N. method for writing a scientific conclusion.

Scientific Method Word Wall Vocabulary

Thirty-nine scientific method vocabulary cards for a word wall.

Science Experiment - Line Up the Light!

A science experiment which explores how light travels.

Plant Journal Observation Worksheets

Observe and record information about plants with a printable plant journal worksheet.

Making a Mini Water Cycle - Experiment

A hands-on experiment to use when investigating the water cycle.

Adjectives All Around - Outdoor Observation Activity

Engaging activities where students observe and describe their outdoors environment.

Rainbow Water Density Tower - Science Experiment Booklet

A fun science experiment about density and physics.

R.E.R.U.N. - Writing a Scientific Conclusion Poster

An educational poster introducing the students to the R.E.R.U.N. method for writing a scientific conclusion.

Design a Fair Test Worksheet - Middle Years

Plant Growth Chart Worksheet

Record the growth and changes in a plant over time with one of our differentiated plant growth charts.

Scientific Investigation Process – PowerPoint

A PowerPoint outlining the scientific investigation process.

• Science Experiments for Foundation Year
• Science Experiments for Year 1
• Science Experiments for Year 2
• Science Experiments for Year 3
• Science Experiments for Year 5
• Science Experiments for Year 6

45 Easy Science Experiments for Kids

Hello, STEM! These simple DIY activities can be done at home or in school.

We've been independently researching and testing products for over 120 years. If you buy through our links, we may earn a commission. Learn more about our review process.

Imagine blowing the biggest bubbles imaginable — or even making bubbles within bubbles. Or sending vessels — rockets, tea bags, airplanes — soaring through the sky for impossible distances. Now imagine making things explode, or change colors, or reveal hidden messages with just a few simple mixtures.

First off, it's good to start them off with the scientific method. Give them a journal to record their observations, questions, hypotheses, experiments, results and conclusions. As always, safety counts: wear goggles and coats or aprons if need be (sometimes kids get a kick out of how scientific the protective gear makes them look), and always make sure that the kids are supervised when doing them. (Warning: Some of these are messy!)

These experiments are mostly designed for preschoolers through elementary schoolers — with a couple that are either demonstrations or better for older kids — but if you have a younger one, you can check out these 1-year-old learning activities , toddler learning activities and preschool/kindergarten learning activities , some of which also cover STEM subjects.

Floating Fish

Here's another one that deals with solubility and density.

• Draw the outline of a fish on the bottom of a glass plate or tray in dry-erase marker. Retrace your drawing to make sure all the lines are connected. Let dry for a minute or two.
• Fill the measuring cup with tap water. Place the pour spout just inside the corner of the dish and add water very slowly until it just covers the bottom. Be careful not to pour water directly onto your drawing or make splashes near it. The water will move toward your drawing, eventually surrounding it. Observe what happens. If the water splashes or it doesn’t work on your first try, empty the dish, erase the drawing with a paper towel, dry off the dish, and try again.
• Tilt the dish slightly from side to side. What happens? Jot it down.

The ink in dry erase markers is engineered to be slippery. It’s made with a chemical that causes it to easily release from surfaces. (Permanent markers are made with a chemical that makes the ink stick to surfaces, so be sure not to use these in your experiment!)

The easy-release ink lets go from a surface, but why does it float? There are two reasons. First, dry erase ink isn’t soluble, which means it won’t dissolve in water. Second, dry erase ink is less dense than the water, so it becomes buoyant, meaning it can float. When you tilt the dish, the fish moves around on the water’s surface.

From Good Housekeeping Amazing Science: 83 Hands-on S.T.E.A.M Experiments for Curious Kids! See more in the book »

Brush, Brush!

This one will really get them into brushing their teeth once they scientifically prove all the good things that toothpaste can do.

• Write on sticky notes: Soda 1, Soda 2, Juice 1, and Juice 2. Place them in a row on a counter.
• Fill two glasses halfway with brown soda and place behind the Soda 1 and Soda 2 sticky notes. Fill two glasses halfway with lemon juice and place behind the Juice 1 and Juice 2 sticky notes.
• Carefully place one egg in the bowl. Squeeze a big dollop — about one tablespoon — of toothpaste on top of the egg and gently rub the toothpaste all around with your hands until the egg is completely covered in a thick layer of toothpaste. Repeat with a second egg.
• Gently submerge the toothpaste-covered eggs into the liquids: one egg in the glass labeled Soda 1 and the other egg in the glass labeled Juice 1. Wash and dry your hands.
• Gently submerge the remaining eggs, without toothpaste on them, in the remaining glasses: one in the glass labeled Soda 2 and the other in the glass of juice labeled Juice 2. Wash and dry your hands. Leave the eggs in the glasses for 12 hours.
• After 12 hours, remove the eggs from the glasses of soda one at a time. Rinse them in cool water and pat them dry with the towel. Place each egg by the sticky note of the glass it was in. Are the eggs the same or different colors?
• Remove the eggs from the glasses of juice one at a time. Rinse them under the faucet and pat them dry. Place each egg by the sticky note of the glass it was in. Feel the eggs gently. Does one feel stronger or weaker than the other?
• Write down your observations in your science notebook.

The eggshells in this experiment represent the enamel (outer coating) on your teeth. Toothpaste cleans your teeth and prevents stains: it removes food and drink particles that are stuck on your teeth. Teeth can be stained easily by dark-colored liquids like cola, coffee or tea. The egg without toothpaste will be brown and discolored. The egg covered in toothpaste was protected from turning brown.

Toothpaste also protects your pearly whites from decay (breaking down). The egg without toothpaste left in the lemon juice was worn down and soft to the touch, while the egg that was protected with toothpaste is stronger. The lemon juice is acidic, and those acids broke down the shell just as acidic drinks can wear away your tooth enamel. When a tooth is worn down, a cavity can form more easily. But the fluoride in toothpaste mixes with your saliva to create a protective coating around your tooth enamel. It helps keep your teeth strong and cavity-free.

Grow an Avocado Tree

For an easy lesson in Earth Science, your family can grow an avocado tree from a pit. You can buy an AvoSeedo kit , or just peel the seed and suspend it over water with toothpicks.

Get the tutorial »

Milk Bottle Xylophone

No for an experiment in sound!

• Arrange six glass jars or bottles, all the same size with no lids, in a line. What will each jar sound like when you tap it with a spoon? Make a prediction, then tap each jar. Record your observations.
• Next, put water in each of the jars. Pour 1⁄4 cup (60 ml) of water into the first jar. Add 1⁄2 cup (120 ml) of water to the second jar. Continue in 1⁄4-cup increments, adding 3⁄4 cup (180 ml) of water to the third jar, 1 cup (240 ml) of water to the fourth jar, 11⁄4 cups (300 ml) of water to the fifth jar, and 11⁄2 cups (360 ml) to the sixth jar. Add a couple of drops of food coloring to each jar.
• What will each jar sound like? Will they sound the same or different than when the container was empty? Will they sound the same or different from one another? Record your predictions.
• Tap each jar with a metal spoon. Write down your observations about each jar’s pitch (how high or low a sound is) in your notebook.

Sound waves are created by vibrations, which are back-and-forth movements that are repeated again and again. Pitch depends on the frequency of the waves — how many are created each second. A high pitch is created by high-frequency sound waves, and can sound squeaky. A low pitch is created by low-frequency sound waves, and sounds deep and booming.

When you tapped the jar, it vibrated. The vibrations traveled from the jar to the water to the air and eventually to your ears. The jars with more water had a low pitch. The sound waves vibrated more slowly because they had more water to travel through. The jars with less water had higher pitches. The sound waves vibrated faster because they had less water to travel through. A jar with no water in it makes the highest pitch because it has the least substance to travel through.

"Elephant Toothpaste"

Okay, elephants don't really brush with this stuff, which is made from a chemical reaction between hydrogen peroxide, yeast, dish soap and a few other simple ingredients. But this experiment has a big "wow" factor since, when the substances are mixed, the "toothpaste" foams out of the bottle. You can use it to teach kids about catalysts and exothermic reactions.

Get the tutorial at Babble Dabble Do »

DIY Compass

Explore the way magnetism works, and how it affects everyday objects, by magnetizing a needle and making a DIY compass. You can even spin the compass in the water, and it'll end up pointing the right way again.

Get the tutorial at STEAM Powered Family »

Craft Stick Chain Reaction

Kids can learn about the differences between potential and kinetic energy with this chain reaction. It makes a big impact: Once the tension is released, the pom poms go flying through the air!

Get the the tutorial at Science Sparks »

Color-Changing Invisible Ink

Kids will feel like super-spies when they use this heatless method to reveal pictures or colors written with "invisible ink." You can try different acid/base combinations to see which one makes the most dramatic result.

Get the tutorial at Research Parent »

Paper Bridge

Get the engineering back into STEM with this activity, which challenges kids to create a paper bridge that's strong enough to hold as many pennies as possible. How can they manipulate the paper to make it sturdier? (Hint: Fold it!)

See the paper bridge tutorial at KidsActivities.com »

Challenge your little scientist to lift up an ice cube with just a piece of string. It's possible ... with a little salt to help. Salt melts the ice and lowers the freezing point of the ice cube, which absorbs the heat from the water around it, making the water cold enough to re-freeze around the string.

Get the tutorial at Playdough to Plato »

Marshmallow Catapult

Another lesson in potential and kinetic energy, kids will love sending mini marshmallows flying in the name of science. Change some of the variables and see how that affects the marshmallow's trajectory.

Get the tutorial at Hello, Wonderful »

Leaf Breathing

It's hard for kids to picture how plants and trees "breathe" through their leaves — until they see the bubbles appear on a leaf that's submerged in water. You can also teach them about photosynthesis by putting different leaves in different spots with varying levels of sunlight.

Get the tutorial at KC EDventures »

Hoop-and-Straw Airplane

We all remember how to fold those classic, triangular paper airplanes, but these hoop-and-straw airplanes fly way better (and straighter). Experiment by changing the length of the straw and the size of the hoops and see how it affects the flight.

Get the tutorial at Mombrite »

Film Canister Rocket

Blast off! You don't need jet fuel to make these rockets go, just Alka-Seltzer tablets and baking soda, but they'll be amazed when they achieve lift-off! (Note: If you can't find old film canisters, tubes of Airborne work, too.)

Get the tutorial at Raising Lifelong Learners »

Coin Inertia

Stack up about five or so coins on a piece of cardboard and place it over a glass of water. Then, flick the cardboard out from on top of the glass. Do the coins drop into the water, or ride with the cardboard? Due to inertia, they drop into the water — a very visual (and fun!) demonstration of Newton's First Law of Motion.

Get the tutorial at Engineering Emily »

Apple Oxidation

What works best for keeping an apple from turning brown? Test to find out! Slice up an apple, and let each slice soak in a different liquid. Then take them out, lay them on a tray, and check the brownness after three minutes, six minutes and so on. Not only does this test the properties of different liquids, it also helps students practice the scientific method if they create hypotheses about which liquids would be most effective.

Get the tutorial at Jennifer Findley »

RELATED: 50 Fun Activities for Kids Will Keep Them Entertained for Hours

Coffee Ground Fossils

By making a salt dough with coffee grounds and pressing various shapes into it (toy dinosaur feet, seashells), kids can get a better understanding of how fossils are made. If you poke a hole in the top before it dries, the kids can hang their "fossils" up in their rooms.

Get the tutorial at Crafts by Amanda »

Chromatography Flowers

Chromatography is the process of separating a solution into different parts — like the pigments in the ink used in markers. If you draw stripes around a coffee filter, then fold it up and dip the tip in water, the water will travel up the filter and separate the marker ink into its different pigments (in cool patterns that you can display as a craft project). This family made the end-result even brighter by adding an LED circuit to the center.

Get the tutorial at Steam Powered Family »

Water Walking

You'll need six containers of water for this one: three with clear water, one with red food coloring, one with blue coloring, and one with yellow coloring. Arrange them in a circle, alternating colored and clear containers, and make bridges between the containers with folded paper towels. Your kids will be amazed to see the colored water "walk" over the bridges and into the clear containers, mixing colors, and giving them a first-hand look at the magic of capillarity.

Get the tutorial at Fun Learning for Kids »

Sunscreen Test

This experiment puts the A (art) in STEAM: Paint different designs on construction paper with different sunscreens, leave the papers out in the sun and compare the results. Then, hang your "conclusions" on your fridge.

Get the tutorial at Tonya Staab »

Marisa (she/her) has covered all things parenting, from the postpartum period through the empty nest, for Good Housekeeping since 2018; she previously wrote about parents and families at Parents and Working Mother . She lives with her husband and daughter in Brooklyn, where she can be found dominating the audio round at her local bar trivia night or tweeting about movies.

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Fun science experiments

Australia and new zealand, international schools, primary home learning, secondary home learning, tes resources team.

Explore this selection of fun experiments you could use with your primary and secondary learners 

The first thing that comes to mind when you think of science is exciting experiments, concoctions in conical flasks, blazing bunsen burners and crisp white lab coats, however, science can be just as fun and safe without the need for a laboratory, safety goggles or a fire extinguisher! 

So why not check out this engaging collection of easy-to-follow science experiments designed to engage and inspire learners of all ages?

Kitchen Science - STEM activities

Egg Drop Challenge

Air Rockets

Primary Science Experiments

FUN Non Newtonian Fluid Lesson (States of Matter)

Rocket Races Activity

Farm Science Experiments

KS1 Science: Plants - plants and sunlight experiment.

Lab Activity: Invisible Ink using Lemon Juice (Fun Back to School Experiment)

Bridge Design Challenge: Experiment

Rainbows Everywhere! Science Talking Point and Experiment

Great Science Experiments for Kids

August 19, 2018 By Emma Vanstone 10 Comments

I’ve found my 5 year old to be incredibly curious at the moment, always asking questions and wanting to know how things work. Even something as simple as a rain gauge has been VERY exciting for her. With that in mind I’ve pulled together a list of great science experiments for kids of all ages! The age ranges mentioned in this post are just a guide, most science is fun for all ages if you tweak the activity a little bit.

I’ve also got a couple of science books available if you fancy taking a look.

Science Experiments for 4-6 Year Olds

B ubble snakes are very easy to make. Try blowing harder and then more slowly and look for rainbows in the bubbles.

Practice drawing or writing with fizzy paint .

Try some ice painting . This always keeps my children busy for ages. Another idea is to freeze a 3D shape and paint that. Cake moulds work really well for this.

Make some filter paper butterflies . This is a fun creative, chromatography experiment.

These superhero themed cress heads are super cute and perfect for learning about germinations.

Find out how many of your own feet tall you are. Is there a pattern?

Children can learn abour what’s inside their body by drawing around themselves or a friend on a roll of paper and then adding in a skeleton or even organs.

A pine cone weather station is a fun way to learn about the weather. Thanks to Rainy Day Mum for this one.

Explore numbers with a Numeracy at Home box.

Learn about static electricity with these  jumping frogs .

Trick your eyes with this super easy optical illusion .

Try to make different shaped bubbles, does it work?

Learn about waterproof materials with this fun activity using soft toys or try my Save the Dinosaur waterproofing activity .

Make a magnet maze and learn about magnetism . Can you make a huge version?

Explore freezing and melting with slushy drinks, you could even try some colour mixing.

Make some coloured ice cubes for more fizzy fun or how about some coloured rocks ?

Find out about arm span and its relation to height in this easy activity.

Make some s hadow puppets  or a shadow frame and then put on a show. What happens to the shadow when you move it away from the light source?

Make mixture with toys . This is great for starting to lean about properties of materials.

Try some colour mixing with jelly .

Sort Ariel’s treasures into groups depending on their properties.

Start to learn about what conditions green plants need to grow with this cress caterpillar .

Have some messy fun with oobleck !

Make some simple patterns using DUPLO.

How about setting up a   chemistry lab in the kitchen? all you need is some coloured water, oil and pipettes.

Science Experiments for 7-11 Year olds

Try a bit of science magic? Can you make an egg bounce ?

Learn about oil and water not mixing and density with this density jar . Experiment with different objects floating on the layers to make it more fun. What happens when you shake it?

How about making some simple ‘shooters ‘ like Red Ted Art , what happens to them when it’s windy? Do they move further if you blow harder?

We LOVE these candy science experiments !

Learn how to clean dirty water using filters or design and build a toy filter .

If there’s a Science Fair coming up, we’ve got lots of easy and impressive science fair projects to try too!

Find out what makes the best sandcastle? Is dry or wet sand better?

More great science experiments for kids

Adult help is definitely needed for this one, but a Water Powered Bottle Rocket is always a big hit in our house.

Make honeycomb, pancakes, meringue and more in this collection of tasty kitchen science experiments and activities.

If it’s coming up to Valentine’s Day we’ve got lots of easy Valentine science experiments and activities too.

We’ve got collections of science experiments and investigations whatever the time of year:

Make a snow volcano, frost on a can and lots more cool winter science experiments .

Make a multicoloured cress caterpillar, colourful flowers and lots more spring science experiments for kid s .

Stay busy all summer long with our huge collection of summer science experiments .

If autumn is more your season, we’ve got lots of fall related science activities too!

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Last Updated on March 29, 2020 by Emma Vanstone

Safety Notice

Science Sparks ( Wild Sparks Enterprises Ltd ) are not liable for the actions of activity of any person who uses the information in this resource or in any of the suggested further resources. Science Sparks assume no liability with regard to injuries or damage to property that may occur as a result of using the information and carrying out the practical activities contained in this resource or in any of the suggested further resources.

These activities are designed to be carried out by children working with a parent, guardian or other appropriate adult. The adult involved is fully responsible for ensuring that the activities are carried out safely.

Reader Interactions

February 14, 2014 at 9:45 am

Wow wow wow! So much to try …. good job it is half term!!

February 14, 2014 at 10:00 am

So many fabulous ideas, I think Syd would enjoy some of these at 2 and a half- and my older boy too- if this rain carries on we will be back for a look during half term next week!

February 14, 2014 at 10:33 am

This is a great list of activities for half term! We had traffic light jelly last night and the kids wanted to know how I got the colours to stick. I love their curiosity at this age.

February 14, 2014 at 2:26 pm

These are FANTASTIC and super fun activities!! Thank you.

February 14, 2014 at 5:54 pm

Bookmarking this for next week as I fear with this bad weather we might be house bound most of half term!

February 14, 2014 at 11:16 pm

Ohh nice Emma, I think my girls would enjoy these and they are nearly 7! Mich x

February 05, 2015 at 8:18 pm

So glad to come across this!! These activities will be a great addition to our family parties and get together this year! Thank you!

September 05, 2018 at 1:25 pm

Wonderful post! We will be linking to this particularly great content on our site. Keep up the great writing.

February 27, 2019 at 9:07 am

Wow! What a brilliant idea! Really smart & great. Appreciate your thoughts. Thanks a lot for sharing this wonderful experience with us.

May 13, 2019 at 3:38 am

These are great activities for my kids. Perfect for family bonding time.

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42 Fun STEM Activities for 4 Year Olds (and Preschoolers)

by Sarah | Activities , Learning , Science | 0 comments

STEM activities are perfect for young kids because it combines learning with fun! Do you have a preschooler in your home? Try out some of these easy STEM activities for 4 year olds for some good educational fun.

Preschoolers are at the perfect age for STEM activities because they are old enough to follow simple directions, understand and think deeper about the world around them, and have a longer attention span than toddlers. 

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Using STEM Activities with Preschoolers

First, what does STEM mean? STEM is an acronym for Science, Technology, Engineering, and Math. You may also hear a similar acronym called STEAM. This one has an added A which stands for Art. 

The activities you’ll find below are a combination of STEM and STEAM activities. Art is important too!

Let’s look at each of the different aspects of STEM and what kinds of activities might be included in each one. 

Science includes many different subcategories such as biology, chemistry, physics, geology, environmental, botany, and more.

For preschoolers (which is 3-4 year olds), science is basically learning the basics of the world around them. 

They are learning how plants grow. About objects they see in the night sky. About all the different types of animals. How our actions affect the environment and simple science experiments.

This is the perfect time to take advantage of your child’s love of farm animals or dinosaurs! Use what they love as a jumping off point for learning. 

Don’t expect mastery at this point, but the beginning of understanding basic scientific concepts, exposure to vocabulary, and learning how to ask questions about what they see. 

Technology may seem like an abstract concept for some- and maybe when you think of technology you think of computers, video games, and screen time. 

While these are part of technology, there is a lot more to it. 

Technology for preschooler may look like beginning robotics, coding, and cause & effect. As well as learning the basics of using things like calculators, cameras, computers, etc. 

Engineering

Engineering may seem like something that is too advanced for preschoolers, but remember that everything is built on smaller ideas and concepts. 

Engineering for preschoolers is all about exploring how things are built, how things work, and problem solving.

Engineering for 4 year olds might look like building challenges with items such as legos, blocks, or random items from around the home or yard. It could be creating mazes or forts.

Basically giving them a potential problem and letting them figure out a way to solve it.

Math probably seems pretty self explanatory- we all know what math is, right?

But math in STEM activities is all about exploring numbers in a more hands-on way. There are no worksheets here!

They can explore concepts of addition and subtraction, measurement, patterns, and geometry. 

Even though art isn’t part of STEM, it is part of STEAM, so I thought I’d include it here as well. 

Art is an important part of building a creative mind. As you would expect, art includes things like painting, drawing, other creative mediums. 

How to Do STEM Activities With Your Child

First and foremost, STEM activities should be fun and engaging. Even if you explain nothing to your child about the activity they will still be able to critically look at what they are seeing and make connections. 

STEM activities should be hands-on. That means you may have to make some alterations to experiments to make them safe for little hands. 

You want to allow them as much control in the activities as possible. Let them measure, build, pour, mix, feel, etc. as much as possible. This means you might have to fight the urge to make things perfect- remember it’s more about the experience than anything else!

While doing the STEM activities with your preschooler, be sure to fight the urge to lecture, but do encourage discussions and observations. 

A big part of STEM for 4 year olds is learning how things work. This means encourage them to look closely at what is happening.

Ask open-ended questions like  what do you see? What is happening here? What do you smell?  As they get older they will eventually move on to writing their data down, but for now just get your preschooler used to observing.

Also encourage them to ask questions. You want them to be curious about WHY things are happening. WHY the experiment turned out the way it did.

There are no stupid questions, so encourage your child to ask whatever they want. And then encourage them to guess on the answer. This is the first step to learning to how to hypothesize and experiment using the scientific method.

Don’t know the answer to their questions? Do some research together!

And finally, kids love repetition. And, while it might annoy you to do things over and over again, it will help your preschooler solidify their understanding of STEM concepts. So do these STEM activities more than once- or as often as your preschooler wants!

42 STEM Activities for 4 Year Olds (and Preschoolers)

Now it’s time for the STEM activities! Below you will find all sorts of fun STEM (or STEAM) activities to do with your preschooler. 

Exploding Baking Soda and Vinegar Bags (a STEM Activity)

Make exploding baking soda and vinegar bags to teach chemistry to young kids!

Cicada Shell Sensory Activity for Nature-Loving Kids

Thrill your bug-loving preschooler with this cicada shell sensory activity to help them learn about cicadas!

How to Teach Kids About the Life Cycle of a Butterfly

Help kids learn about metamorphosis using real butterflies!

8 Fun Candy Corn Math Activities for Young Kids

Try these Candy Corn math activities for kids to make their Fall and Halloween math practice fun and exciting!

Oil and Water Sensory Bag for Science Exploration

Let your kids learn about oil and water with this oil and water sensory bag for mess free science fun!

How to Do a Nature Scavenger Hunt for Kids (of All Ages!)

Go on nature scavenger hunt for a fun nature-filled activity for kids, and parents, of all ages!

Simple Acids and Bases Science Experiment to Do With Kids

Try this acid and base experiment to test household solutions and decided if they are acidic or basic!

Fun Chemical Reaction Experiment for Kids That Gives Off Heat!

Try this chemical reaction experiment that shows how chemical reactions produce heat!

How to Make Dancing Popcorn

Have fun learning chemistry with this fun dancing popcorn activity!

How to Create a Fun Baking Soda and Vinegar Sensory Play Tub

Make a baking soda and vinegar sensory play tub that will keep them engaged for hours!

Marbled Planet Craft: A Fun Way to Learn the Planets

Make beautiful swirled planets to help teach your children about space and learn the planets by name.

Simple Color Mixing Activity for Kids

Try this simple, hands-on color mixing activity to teach about primary and secondary colors!

7 Math Centered Candy Heart Activities for Young Kids

Make math fun this Valentine’s day by bring some candy hearts into your lessons! 

How to Make Fizzing Baking Soda Paint (a STEAM Activity)

Try making baking soda paints to combine science and art into a fun activity for all ages!

How to Make Glow in the Dark Slime!

Make your own glow in the dark slime!

Fun Fizzing Baking Soda Dinosaur Eggs STEM Activity

Try making these fizzing baking soda dinosaur eggs- and hatch them out with vinegar!

How to Have a Math Scavenger Hunt + Free Printable

Host a math scavenger hunt for the kids and make learning fun!

Fire Slime- A Simple Slime Recipe for Science Fun!

A simple slime recipe that kids can make on their own and learn a little science along the way!

How to Make the Best Paper Airplane for Long Flights

Paper airplanes use thinking skills and attention to detail. Plus they're fun to fly!

8+ Water Bead Activities for Hours of Sensory Fun

Experiment and explore with water beads!

More Simple STEM Activities for 4 Year Olds

Here are a few more simple preschool STEM activities to try with your kids: These encourage critical thinking and natural curiosity, plus they are tons of fun!

Coloring Flowers:  Place white flowers (like daisies or carnations) in vases filled with colored water. Watch the white petals change color!

Make Your Own Fossils:  Use homemade playdough or clay and make fossil prints of your tiny dinosaurs, shells, or other toys animals.

Baking Soda and Vinegar Balloons:  Blow up a balloon using the reaction between baking soda and vinegar! You can get the full instructions here: 7 Baking Soda and Vinegar STEM Activities for Kids

Make Rain in a Cup:  Fill a cup with 2/3 with water. Fill the rest of the way with shaving cream (this is your rain cloud). Drip blue food coloring on top the cream and watch it slowly rain down into the cup!

Magnet Exploration Tray:  Set up a tray with various magnets and metal pieces- and maybe some non metal objects as well. Let your child explore how the magnets work!

Make Rock Candy:  Learn about super saturated solutions and crystal making- and get something yummy to eat! Here’s a simple recipe: Rock Candy

Grow Crystal Snowflakes or Ornaments:  Make borax solution and place pipe cleaners molded into shapes in the solution, Watch the crystals grow! Here’s how: Borax Snowflakes . *Watch your child carefully around borax.

Pencils in a Bag:  Fill a ziploc bag halfway with water and zip close. Carefully poke sharp pencils through the bag all the way to the other side. Does the water spill out? How many pencils can you add before it leaks or pops?

The Lego Challenge:  Challenge your child to build something specific out of legos. Like a chair for a small stuffed animal, a bridge, or any other structure.

Marshmallows and Toothpicks:  Give your child a tray of mini-marshmallows and toothpicks and encourage them to build and explore. What shapes can they make?

Sink and Float Tub:  Give your child a tub of water (or just use the sink or bathtub) and collect various objects from around the house. Have them guess and test which will float and sink.

A Measuring Station: Give your child a variety of measuring devices- yard stick, ruler, measuring tape, etc. And explore measuring things- don’t forget to estimate the lengths and use things like your own hands or feet to measure too!

Non-Newtonian Fluid:  All you need is cornstarch and water and you have this fun goop to explore with. Is it solid? Is it liquid?

Plant a Garden (or Some Seeds):  Gardening is the best way to learn about the lifecycle of plants. Even if you can’t grow a big garden, plant some bean seeds, watch an avocado pit grow, or sprout some potatoes! Don’t forget to point out the different parts of plants!

Make Seed Bombs: Mix flower seeds in with clay and allow to dry. Throw them out in the yard and watch them grow!

Build a Volcano:  This old school activity is always a fun science experiment for kids! They just love building the volcano out of mud, dirt, or clay. And watching the baking soda and vinegar eruption!

Make Your Own Ice Cream in a Bag:  Get some cream, sugar, vanilla, rock salt, ice and some plastic bags and you can make ice cream! Here’s how: ice cream in a bag .

Walking Water Experiment:  Watch water “walk” from one place to another and learn about capillary action! All you need if food coloring, water, and paper towels. Here’s how to do it: Walking Water Experiment

Mentos and Coke Explosion: Similar to a volcano you can make a big chemical reaction by dropping mentos candy into a bottle of coke! Maybe you could experiment with other sodas as well!

Make a Balloon Rocket: Place a straw on a length of string. Stretch the string across the room and secure so that it is taut. Blow up a balloon- but don’t tie it. Tape the straw to the top of the balloon and let it go- how far will it travel across the string?

The Building Challenge:  Challenge your child to build something with uncommon building materials- such as plastic cups, rocks, paper, recyclables, etc. Let them explore and see how big or how high they can build. This is a simple STEM activity that builds problem solving skills. 

And finally don’t forget the biggest STEM activity of all: Play. Playtime is how preschoolers learn. So surround them with learning opportunities and open-ended toys. Here are some of my favorite:

• Magnetic Tiles for building
• REAL tools in kids sizes- give them some scrap wood, a hammer, nails, screws, screwdrivers, etc. 
• Doughs like playdough, kinetic sand, moon sand, etc. 
• Exploratory tools like magnifying glasses, microscopes, bug boxes, butterfly nets, etc. 
• Realistic animals

You want to give your child toys that can be used in many different ways to create and explore with!

Who Can Do These STEM Activities?

Even though the list of STEM activities is aimed for 4 year olds, really kids of all ages can have fun with these simple STEM projects. In general though, these activities will be good for kids preschool age to elementary school age. 

Just remember to tailor them to  your own child’s abilities. Kids don’t magically gain abilities when they pass their 3rd or 4th birthday- so some toddlers may be able to do these fun activities and some 4 year olds might not be ready for them.  But with a little alterations even 1 year olds and toddlers can enjoy many of these fun activities- so go ahead and involve the whole family!

Older kids may also want to participate. They will be able to understand deeper concepts than preschoolers and may be able to help explain things to younger siblings!

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Fun Science Ideas for 3-4 Year Olds

My naughty little princess Tisha has just finished her birthday and entered 3. I decided to do a lot of fun activities and make her understand science in an easy way. Yes, they are STEM activities. At the same time, we are trying to add more experiments age wise to all the little ones and add value.

(We have consciously decided to update this page on a regular basis to share our innovative ideas with you). Do not forget to check our site periodically even daily once will help you with creative science projects. Alternatively, subscribe  and you can get our ideas dropped in your mailbox soon after it is updated here.

Fun Science and STEM Activities for 3-4 year olds

Dancing Ghosts : Halloween Balloon Static Electricity Activity

Static Comb Experiment : Explore Static Electricity for Kids

How to Make Glowing Water : Science Experiment

How to Make Oobleck (A Perfect Non Newtonian Fluid)

Cool Watermelon Science Experiments for Kids

Skittles Rainbow : Dissolving Dye Science Project

Exploring Veins Patterns in Leaves – Kids Painting Activity

Egg and Toothpaste Experiment (Learn Importance of Brushing Your Teeth)

How to Make a Square Bubble

Sensory Play with Jelly (Find out Solid or Liquid)

How to Draw on Water Using Dry Erase Markers (Dancing Drawings)

Walking on Eggs : Measure the Strength of Egg Shell

How Strong is an Egg Shell? Strength of Eggshell Bridge

Rainbow Rubber Egg Science Experiment

Easy Experiments to Introduce Magnetism to Kids

DIY Pully – Physics Fun Experiment for Kids

Respiration in Plants – Live Proof

Candle Under Glass Experiment

DIY Borax Bouncy Ball -Experiment

Glowing Water Beads Experiment for Kids

Easy Volcano Eruption Experiment for Kids (3 Methods & Beautiful Results)

Questacon (Australia’s National Science and Technology Centre) – Place to Visit With Kids

Science Behind Making Butter

How to Start Fire with a Magnifying Glass?

Glow in the Dark Ice Cubes – Sensory, Edible Science Activity

Density Science for Kids : Create Fireworks in Water & Oil

STEM Toys for Girls : 2019 Topmost Toys for Curious Girls

Engineering Toys for Girls : 2019 Ultimate List for Little Geniuses

Why Do Flowers Change Color in Food Coloring – Experiment for Kids

Spiny Leaf Phasmids : Secret Life of Pets (DIY Enclosure Steps!)

DIY Christmas Tree Magnet Maze (Fun Science Game)

Book Review of Ada Twist, Scientist

Wildlife Habitat Port Douglas : Nature Learning for Kids

Safety Glasses – Advantages & Using Guide

Swirling Milk Experiment (Magic Milk Activity)

DIY Christmas Tree Bubble Wand {Learn bubble physics}

Catapult STEM Project – DIY Catapult for Kids

Coloring Activity – Girl as a Scientist

Sea Life Sydney Aquarium – Perfect Excursion for Kids

Upcycled Catapult – STEM go green DIY Challenge

Static Electricity Balloon and Salt and Pepper Experiment

Spore Printing with Mushroom – Botany Lesson with Fungi

How to make Curds and Whey

Naked Egg (Dissolving Egg Shell) Experiment

How To Make Balance Scales for Toddlers and Preschoolers

How to Make Heart Shaped Bubble Wand

Easter Egg Bubble Wands

Magnet Maze Game Designing Activity – Learn Science and Art

Shape Bubble Wands – DIY in Different Shapes

DIY Fridge Door Marble Run Using Magnets

Comparing Different Seeds – An Activity About Nature Science

Delightfully Fizzy Sherbet

Want even more preschooler science activities?

In case you want to get several innovative science concepts for your little ones going to preschool, then you can take a look at these links given below.

• Alum crystal glows – Take a highlighter, alum, spoon, hot water, black light, and scissors. All are available easily. Be careful when kids use alum. Extract the ink from the highlighter for doing this experiment. Blacklight is mandatory to make the alum glow. For more details Easy science for kids .
• Dancing Raisins – See how this little one is making raisins dance. He is very clearly explaining the experiment. You can also let kids follow his instruction and make raisins dance. With ingredients available in kitchen countertop make this dance show happen. For more details Youtube dancing raisins .
• Rhythms of Play got a great idea about Fish using Magnets . You must not miss out to add fun to your little ones.
• This  colorful celery found in Look We Are Learning is yet a great method to see plants transferring their nutrients and water to other plants.
• Fruits can be stopped from browning – Lets now teach kids about how to keep fruits from browning. For this experiment, you need fruits and lemon juice. Any of these solutions will help teach kids about preventing fruits from browning. For more details Really are you serious .
• Childhood101 has given a great explanation about making a miniature of microscope just with things available at home.
• Fantastic Fun and learning have explained about dissolving lollipop . Check it out.
• Trio experiment with water – These experiments will help students to understand about water and its properties. Whether all substance dissolve in liquid(water)? How water helps the plant to grow? Why water melts fast? So, all these are about water. Try to involve kids to make them understand better. For more details Kids Academy .
• Does ice get affected by salt?  Try this activity to explore more. Learn the way water is absorbing watercolor. This is from Learning and Exploring Through Play.
• Its time to make fun with sounds and here you go with KC Edventures art that has made a musical instrument which will be heard by one person and you can do it yourself
• Now become an artist by painting just using Epsom salts . Gifted by One Creative Mommy. You can see the glowing faces of kids when they see the crystals upon drying.
• Drinking Density Experiment – Make some juice to drink. Yes, it is a cocktail and you are just not going to make kids drink but teach density of different liquids from this experiment. Sugar makes the drink denser. Take different juice and add sugar to it and that will decide the density of the juice. See layers of juice in glass through this lesson. For more details Science Bob
• Here’s a  safe way to explore bubble with apples ! Presented by the Powol Packets.
• Oxygen from plants – We tell kids not to sleep under a tree during the night because they release CO 2. This lesson will talk about leaves creating oxygen. Apt for a 3rd grade to teach about plants and related to human respiration. For more details Projects jugaad
• Use modeling clay and playdough to teach moon and its phases just like KC Edventures did.
•  i-spy bottle can make galaxy so you can teach kids about naming planets. Learn this art by checking Best Toys 4 Toddlers postings.
• Double gazed drinking – Using plastic bottles, glass, hot water, and thermometer it is now possible to teach kids about heating and temperature. This is a double gazed glass experiment to help understand about heating. For more details Owlcation
• Get ready for designing sun prints on your own and this is a STEM + Art project called STEAM explained by Creative Family Fun.
• Making constellations is as simple as that with toothpicks and marshmallows . Have some additional marshmallows due to the reason that it might vanish while constructing. Proudly posted in Munchkins and Moms.
• Homemade air cushion vehicle – You can now teach kids about hovercraft. Yes, this air cushion vehicle can be made with pop up bottle cap, CD, and a balloon. See how this works. It is fun and a good way to teach kids. For more details Kid spot
• Balloon Car – Only with a drinking straw, plastic bottle, and balloon your kids can make a car. Here teach about the car and its functioning. To make kids feel glad about making a car on their own follow this instruction. How do wheels rotate and what is required to move the car can be taught in this lesson. For more details Awesome ideas
• Buggy and Buddy teaches  making rainbow along with prisms lesson
• Lets now quench the curiosity of kids about frosting and condensing by making them happen at your home. Learn this from Look We Are Learning.
• Gravity with rubber bands . How is it possible? Yes, it is and you can check this out to see the stretching capacity of rubber bands. Check out Planet Smartypants for more details.
• One more friction lesson – Friction is an important lesson for kids and you can easily demonstrate that with rice filled in a bottle. Let every kid apply force based on their capacity and learn friction. For more details Carrots are orange
• Leak-proof bag – If you fill water in a plastic bag with a hole, then will water stay. Obviously, the answer is no. But do you know this experiment will prove it wrong? Let kids fill water in a plastic bag and then make a hole with a pencil to see no water leak. For more details What do we do all day
• The Chaos and the Clutter are now showing a very quick and easy experiment with ice. How does ice melt faster than ever ? You know what my Tisha found this internet and made me do this at once. But trust me that was all fun.
• Now comes growing seeds and check NurtureStore to teach kids about growing pea and bean seeds . How they actually germinate. Let kids learn about plant formation from seeds.
• Rain inside a jar – It can now rain inside the jar. So make it rain and teach the water cycle. Yes, evaporation and condensation can be easily taught using this experiment. For more details, I can teach my child
• Dry ice and sublimation – Sublimation can be quickly taught with dry ice. The coldest ice creates smoke. But be careful and no let kids touch as it will damage the skin. For more details Tinker lab
• Potion making is loved by all kids and there is no exception and I swear that it gives immense happiness in exploring the reactions taking place chemically in a fun and playful way. Kids can try themselves is the additional bonus. Powol Packets do not have dearth to Love Potions Projects . Even at Buggy and Buddy, they do potions with extra foam and yes by adding liquids used to wash vessels in the kitchen.
• Underwater candle – It is possible to make a candle glow under water. It is a simple trick. See this experiment and candle glow and wax holds the water.For more details Youtube Candle Science Experiment
• Ornaments with salt – Salt is nothing but sodium chloride NaCl. Everyday kids eat this chemical and must learn about the science behind it. Let them make some ornaments with salt and as well understand about the chemical properties. Concept of baking and production of heat is also explained in this experiment. For more details The picky apple
• I Heart Crafty Things has posted a new idea for future scientist and here – making a butterfly with tissue papers are simple and even the flapping wings are shown using static electricity .
• Vinegar and baking soda make a wonderful combination and they are just fun to kids due to its fizzing sound. NurtureStore displays the best part made by her girls and these are glittering and fizzing plus looking great with molds that are heart-shaped (can anything else be more attractive for a Valentine party?). Buggy and Buddy showcase the ways in which adding  vinegar that is colorful along with pipettes  creating a bright and nice to look fizz work. Again Powol Packets have their work with innovation and their fizz are sparkling ready to explode .
• Elephants can now brush teeth – Have ever imagined elephants brushing teeth? It is fun to visualize. With this paste now elephants too can brush their teeth. Breaking down hydrogen peroxide to water and oxygen is the science involved in this. For more details The preschool powol packets
• Acids and Bases – Use this red cabbage juice to teach kids about acid and base. You can take vinegar for acid and baking soda as a base. Mix them in a glass of cabbage juice to see how acids and bases react. For more details Steve Spangler
• Again Buggy and Buddy have presented a great activity with salt and oil. Here you can find the  density of water
• How does milk react with liquids used to wash vessel that contain lemon and food colors? Eager to know this yes you can find it at our place and we named it Swirling Milk . You can also see how Best Toys for Toddlers has named it Milk Marbling . And, another innovative name kept by Messy Little Monsters is  Magic Milk Fireworks . Irrespective of the name this experiment will surely win the heart of the toddlers.
• Dye on heat – This experiment will explain why dye works. How does it work? Get one coffee mug and markers to allow kids to write their names in a coffee mug. Teach them about heat and baking. For more details a beautiful mess
• Once again Buggy and Buddy have an experiment for kids that talks about exploring center for rocks which certainly encourage kids to learn about geology.
• Check out for wild carrots which are the Queen Anne’s Lace and these flowers grow in any place. At Fireflies and Mudpies, all kids become great artist painting them green, yellow and blue . Witness the same coloring activity with  chrysanthemums at the NurtureStore. (You can see them with gerberas  at our site also tried with numerous white colored flowers to demonstrate the color absorbing capacity .
• At the age of 3 and 4 kids will love the experiment walking water where the demonstration of capillary action and color mixing is really amazing. Here the colored water will move the paper up fighting gravity. Wow! Apple Green Cottage explains this in their site using a paper towel and glass jars . Also, you can see this experiment that uses cold and hot water along with different paper at Royal Baloo .
• Multicolored Celery – See this little girl carrying out an experiment with celery sticks. She demonstrates how celery color changes. Take two glass with water, one celery stick and dye colors for following this experiment. For more details Youtube celery

Want even EVEN more ideas?

Find more inspiring ideas on our page exclusive for kids aged 1-2 years – feel free to make some small changes and they will become workable to elder kids as well. (My kids repeat the same activities at different age and learn things per their knowledge at that age. Off course there is no dearth to the fun as well.)

Also, you can find activities for kids aged 5-6 years and click on that page. But remember to provide help to your kids as they need support.

Above all check them on the Pinterest board Fun Science for Kids

Let us know which experiment does your 3-4-year-old kids loved to do.

Please provide support to kids and never leave them alone. Ensure to stay with kids and allow them to do only the appropriate activity relevant to age and the skill set they have. Click  here  for more information.

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Japace 100+ Experiments Science Kit for Kids Age 4-12 Year Old, Cool Boy Christmas Birthday Gift Ideas, Chemistry and Physics Set Toys for Boys Girls

Surprising 100+ Experiments

Building Science

• 100+ COOLEST SCIENCE EXPERIMENTS FOR KIDS: Japace science kit conforms to stem projects that includes over 100 experiments - create fizzy reactions, underwater volcano, soap making, crystal growing tree, make wiggly worms, and more. When children play in these science experiments, they're creating all sorts of powerful cognitive anchors, may make science geeks out of your kids yet!
• LITTLE SCIENTIST IN THE MAKING: This 100+ piece set includes plenty of scientific lab tools like a beaker, measuring cups, test tubes, droppers, googles, gloves and more materials necessary to conduct over 100 cool and fun experiments, which encourage children to pretend and become real scientist.
• EASY TO FOLLOW & KEEP KIDS ENTERTAINED FOR AGES: The kit includes step-by-step instructions with photos that are easy to understand. I have a 5 year old daughter who loves to figure out how the world works so I sent this set to her as 5th birthday gift. She loves it and being entertained for ages. The great thing is that it is not only entertaining but also a learning experience all in one.
• COMPLETELY SAFE TO DEVELOP SCIENCE SKILLS AND CURIOSITY: Japace STEM toys conforms to US Toy Safety Requirements. It is a safe way for kids to learn scientific concepts and skills they can apply to everyday situations as they journey from childhood to adulthood: problem-solving, experimenting, decision-making, dealing with failure, gaining perspective, and persevering. Scientific principles are a framework for "how-to" navigate life.
• AN EDUCATIONAL GIFTS FOR CURIOUS LITTLE MINDS: This STEM set makes excellent gift ideas for Christmas, birthdays, summer boredom, school breaks, and weekend fun. The kids will get a good way to learn through play, and parents will get some quality science time in with kids, even grandparents can get in on the fun with using Japace science kits with the grandchildren.

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Product Dimensions	15.35 x 11.42 x 3.54 inches
Item Weight	3.56 pounds
ASIN	B09VD6X1JN
Item model number	NI-BUE8-BVQF
Manufacturer recommended age	4 - 12 years
Best Sellers Rank	#3,559 in Toys & Games ( ) #44 in
Customer Reviews	4.7 out of 5 stars
Manufacturer	Jinhua Xukong Toys CO., Ltd

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100+ CHEMISTRY EXPERIMENTS SET

Kids can explore 100+ exploding science experiments.

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Explore 105 science experiments, including earth science, science magic, chemistry and physics.

EXPERIMENTS & BUILDING SETS

Explore 65 cool experiments for kids, and enjoy 3 building sets at the same time.

GIRLS SETS--75+ EXPERIMENTS

75+ COOL EXPERIMENTS RECOMMENDED FOR JUNIOR GIRLS!

Product Description

CONDUCT ICE CREAM MONSTORS

Simple but fun experiments -this is super coool to watch the foam slowly come out and erupt! It help kids build persistence and problem-solving skills as they figure out how to make the experiment a success.

GROW CRYSTAL TREE

This experiment is aimed to improve kids' patience and observation skills. Kids can find the wonder of the world through watching the crystals growing gradually.

MAGIC HYDROPHOBIC SAND

It would be nice to have this kind of sand on the beach because the sand will never stick to your feet when they are wet. Let's explore why it is waterproof.

EXPLORE COLORFUL WATERFALL

Explore the magic reaction of food coloring, oil and water, and learn the density of them.

WHERE DID THE WATER GO?

Pour some water into the cup, and then take the cup upside down. Magic! The water is gone. How did that happen? Let's explore with Japace.

SELF-INFLATING BALLOON

How did the balloon get blown up without blowing? Let's explore with the Japace.

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What's in the box

• pen, water absorbing polymer, baking soda, citric acid, calcium lactate, suger, starch, sodium alginate, flour, sand, color agent, candy, effervescent tablet, red cabbage, crystal growing liquid, sodium acetate-liquid, sodium acetate-solid, candle-red, candle-blue/yellow, soap base, scent

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Customers say

Customers like the organization, completeness, and quality of the science fundamentals kit. For example, they mention it's well organized, comes with almost everything needed to conduct the experiments, and makes a great gift. That said, they are satisfied with ease of use, and entertainment value.

AI-generated from the text of customer reviews

Customers are satisfied with the quality of the science fundamentals kit. They mention that it has lots of great experiments and contains all that is needed for each one. Some say that the kit is interesting and has some good experiments, while others say that it's awesome and has twenty plus experiments.

"...My favorite part are the true to life scientific equipment that’s included. A real buy!" Read more

"My grandson loved doing the experiments.Its a great educational product ." Read more

"...He has really enjoyed all of the experiments so far. The quality is great , and they are happy with the variety and number of experiments." Read more

"This was a very nice kit for my grandson for activities for the summer...." Read more

Customers find the instructions in the science fundamentals kit easy to understand and implement. They also say the experiments are fun and easy to follow. Customers also say it's convenient to have most everything they need in one place and that it explains everything well.

"...They love doing the experiments in them. So easy for her to do with some asistance...." Read more

" Easy to follow directions . Everything is included.The box is too small to store the contents after it has been opened" Read more

"...It pretty much has everything you need in the kit and the instructions are very clear . For what you’re paying for, it’s great value for the money...." Read more

"My 7 year old enjoys it. So far, experiments have been easy to set up and done with the kiddo after I come from work or after a busy day...." Read more

Customers find the science fundamentals kit entertaining with easy-to-follow experiments and great activities. They also say it's educational and keeps kids busy. Customers also mention it'll keep them interested for hours and is a perfect weekend night activity.

"...Was I wrong! The kit contains age appropriate, creative, fun , and interesting experiments...." Read more

"My daughter loves science and we have been loving this kit. It’s great for playdates and all her friends love it when they come over." Read more

"Great for kids, lot of learning and fun involved with this kit" Read more

" Granddaughter loves this easy and fun ." Read more

Customers find the science fundamentals kit complete with almost everything they need to conduct the experiments. They say it has easy-to-follow directions, plenty of materials, and lots of pieces. Some customers also say it's a good starter kit for kids ages 6-10.

"...So easy for her to do with some asistance. Comes with everything you need just need a couple around the house." Read more

"...It pretty much has everything you need in the kit and the instructions are very clear. For what you’re paying for, it’s great value for the money...." Read more

"...child, which is great! The kit includes nearly everything needed for all of the experiments (test tubes (and holder), beakers, droppers, red cabbage..." Read more

"...Was very impressed that truly comes with everything . Would highly recommend." Read more

Customers say the science fundamentals kit makes a great gift. They appreciate the kit items are packaged extremely well and the instructions are clear for each.

"...It would also make a gift ." Read more

"...Pros: The kit items are packaged extremely well and the instructions are clear for each experiment (102 total)...." Read more

"I attend A LOT of birthday parties and this is a perfect gift ...." Read more

"...She wants to do daily science experiments now 🥰 amazing gift , kit is well organized, well labeled and the box is an awesome caring case!..." Read more

Customers find the science fundamentals kit very catered to kids. They say it's great for young children, and keeps them interested and busy for hours. Some say the experiments are kid friendly, and adults supervision is a plus.

"...Was I wrong! The kit contains age appropriate , creative, fun, and interesting experiments...." Read more

"... Age appropriate and safe for kids " Read more

"We loved it! Lots to do and experiments were kid friendly !" Read more

" Great for kids , lot of learning and fun involved with this kit" Read more

Customers find the science fundamentals kit well organized and labeled nicely. They also say the materials are prepackaged in easy to find marked packages.

"...science experiments now 🥰 amazing gift, kit is well organized, well labeled and the box is an awesome caring case! Highly recommend to all parents!!!..." Read more

"...The materials come labeled and the instructions do a wonderful job explaining each experiment and providing clear instructions...." Read more

"...Most of the supplies are included and clearly labeled . We’ve had to provide vegetable oil and dish soap...." Read more

"...This one is the best! Twenty plus experiments, clearly organized materials , clear instruction book...." Read more

Customers find the science fundamentals kit worth the price.

"...For what you’re paying for, it’s great value for the money . It would also make a gift." Read more

"...Totally worth it for the price I paid." Read more

"...Im sure this is actually much less expensive than trying to put together a kit on your own." Read more

"...The experiments are fun, easy and some are repeatable. Worth the money . I would definitely recommend." Read more

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45 Easy and Fun Science Activities for Preschool

Introduce curious little minds to a world of discovery.

Every day is a new opportunity for toddlers to ask “Why?” over and over. Tap into that curiosity with these fun and engaging science activities for preschoolers. These simple experiments incorporate many preschool favorites like playing with bubbles or water, making arts and crafts, and, of course, making a mess!

To make things even easier, we’ve rated every one of these preschool science activities for preschoolers based on difficulty and materials.

Difficulty:

• Easy: These are low- or no-prep experiments you can do pretty much anytime
• Medium: These take a little more setup or a longer time to complete
• Advanced: Experiments like these take a fairly big commitment of time or effort
• Basic: Simple items you probably already have around the house
• Medium: Items that you might not already have but are easy to get your hands on
• Advanced: These require specialized or more expensive supplies to complete

Water Preschool Science Experiments

Stem challenges for preschoolers.

• Seasonal Preschool Science Activities

More Science Activities for Preschoolers

These water activities for preschoolers help teach little learners a variety of science concepts. (These can get a little messy, so you might want to try them outside.) Find even more water science activities here.

Make music with xylophone bottles

Difficulty: Easy / Materials: Basic

The classic experiment using varying levels of water in glasses or bottles is even more fun when you add some food coloring. Experiment with different water depths and mallet styles to make all kinds of beautiful music!

Learn more: Xylophone Bottle at Mama Papa Bubba

Surround kids with an oversized bubble

Difficulty: Easy / Materials: Medium ADVERTISEMENT

Kids (and let’s face it, adults too) will definitely get a kick out of this fun science experiment. While you’ll only need a kiddie pool, some dish soap, and a Hula-Hoop to make this a reality, the payoff will be big.

Learn more: Giant Bubbles at Make and Takes

Watch rice dance in water

There are lots of cool baking-soda-and-vinegar experiments out there ( ever made your own volcano ?), but this one is always a favorite with little ones. The acid-base reaction causes the rice to dance and jump around in the water for an effect that is just so cool!

Learn more: Dancing Rice at Green Kid Crafts

Reveal colors with chemical reactions

Preschool science experiments often include a combination of baking soda and vinegar like this one. Fill muffin tins with a drop of food coloring, then top it with baking soda. Finally, let kids squirt in vinegar to reveal fabulous foamy hues! (Be sure to wear eye protection for this one.)

Learn more: Fizzy Fun at Busy Toddler

See what sinks and what floats

This preschool science activity helps kids learn to construct a hypothesis, conduct a simple experiment, and then sort their findings by property.

Learn more: Sink or Float at Fun With Mama

Learn what dissolves in water

Engage in more water play by having kids predict which items will dissolve in water and which ones won’t. Have kids keep track of the results so they can see if they have anything in common.

Learn more: What Dissolves in Water? at Hands On as We Grow

Watch hot water rise and cold water sink

This early exploration into the concept of density is always impressive to see in action. Have kids discover how hot water rises and cold water sinks. Explain that the same applies to air, and see if kids can think of a way to observe that in action too.

Learn more: Water Density Experiment at Mombrite

Grow a paper towel rainbow

“Capillary action” might be a real mouthful for preschool science students, but they don’t need to remember the term to be impressed by this experiment! All you need are markers, a paper towel, and two glasses of water.

Learn more: Capillary Action Experiment at Mombrite

Make shaving cream rain clouds

This is a classic science activity every kid should try at least once. It helps them understand how clouds become so saturated with water that they must release it in the form of rain.

Learn more: Shaving Cream Rain Clouds at One Little Project

Blow bubble towers

There are lots of fun science activities you can do with bubbles to explore concepts like surface tension. Or you can just have a blast seeing who can make the tallest tower with bubbles and straws.

Learn more: Bubble Towers at Happy Hooligans

STEM challenges give students a chance to try solving problems on their own. Give them some basic supplies and instructions, then let them experiment until they find a solution to the challenge.

Rescue toys from hot lava

While you might not want pre-K kids climbing all over the classroom furniture to play “The Floor Is Lava,” they can do the same thing with their toys in this cute STEM challenge.

Learn more: Floor Is Lava at Forward With Fun

Build a catapult

Challenge students to build a catapult using just three items: Popsicle sticks, elastics, and a plastic spoon. You’ll definitely want to have an extra set of adult hands available as this can prove challenging for pre-K kids. Finally, bring plenty of marshmallows or pom-poms to launch.

Learn more: Make a Catapult at Education.com

Discover strength in shapes

Learn shapes while also practicing some basic science. Fold paper into various shapes to form columns and ask kids to predict which will be able to support the most books.

Learn more: Strength in Shapes at All for the Boys

Build an aluminum foil boat

Teach kids about buoyancy and physics while having fun in the process. First, give your students some tinfoil and challenge them to build a sturdy boat. Then, challenge them to fill the boat with as many pennies as they can without it sinking.

Learn more: Foil Boat Challenge at Little Bins for Little Hands

Waterproof a boot

Ask kids to select various materials and tape them over the free boot printable found at the link. Then, test their hypotheses to see which ones work best.

Learn more: Waterproof a Book at Science Sparks

Reach for the sky

Round up all your building blocks and try this whole-class project. What will students need to do to be able to construct a tower that reaches all the way to the ceiling?

Learn more: Tower Engineering Challenge at Mama Smiles

Link up the longest paper chain

This incredibly easy preschool STEM activity really gets kids thinking. The challenge? Create the longest possible paper chain using a single piece of paper. So simple and so effective.

Learn more: Paper Chain Challenge at Frugal Fun for Boys and Girls

Build an apple toothpick tower

Put a healthy spin on a classic STEM challenge by substituting apple pieces for marshmallows. Kids will have a tasty snack when they’re done!

Learn more: Apple Toothpick Tower at N. Family Club

Stack up plastic cups

Kids absolutely love stacking cups ! Turn the play into a STEM challenge by adding index cards into the mix. Kids can experiment to see if they can build taller towers with or without the cards.

Learn more: Solo Cup Engineering Challenge at The Salty Mamas

Craft a nest

Take a nature walk and pick up items like sticks, leaves, and more. Then, build your own bird nests to protect little eggs and hatchlings.

Learn more: Build a Nest at Pink Stripey Socks

Seasonal Science Activities and Experiments for Preschoolers

Whether you’re looking for Halloween science activities , winter science experiments , or Easter egg activities , find them all and more here!

Make pretend snow

No snow where you live? Make some yourself! Find easy recipes for “snow” using baking soda, shaving cream, cornstarch, and other household items. Experiment to find the one that works best.

Learn more: Make Pretend Snow at Elf on the Shelf

Explore how mittens keep you warm

Ask little ones if mittens are warm, and they’ll likely answer yes. But when they measure the temperature inside an empty mitten, they’ll be surprised by what they find. Learn about body heat and insulation with this easy experiment.

Learn more: Mitten Body Heat Experiment at Classroom Magic

Measure the water content of snow

Two inches of snow is not the same as two inches of rain. This easy winter science experiment measures the amount of water actually found in an inch of snow.

Learn more: How Much Water Is in Snow? at KC Edventures With Kids

Create salt crystal hearts

Difficulty: Medium / Materials: Basic

Make these pretty red crystalized hearts as Valentine’s Day decorations, or anytime you want to show someone some love!

Learn more: Salt Crystal Hearts at Red Ted Art

Grow grass in an eggshell

Difficulty: Medium / Materials: Medium

What’s more fun than a preschool science experiment that doubles as a craft? You’ll need eggs, soil, grass seeds, water, and a permanent marker to bring this project to life. Kids will especially love personalizing their eggshell.

Learn more: Egg Grass Heads at Mother Natured

Decompose a jack-o’-lantern

Difficulty: Easy / Materials: Medium

When Halloween is over, plop your jack-o’-lantern pumpkin in the garden and observe it each day. Kids learn how organic matter breaks down over time.

Learn more: Pumpkin Decomposition at Gift of Curiosity

Send a ghost flying with magnets

Use magnets along with a few other supplies to make a tissue ghost seem to float in midair! It’s the perfect spooky Halloween science activity for preschoolers.

Learn more: Flying Ghosts at STEAM Powered Family

Conduct experiments on marshmallow Peeps

Pick up a package of marshmallow Peeps (they’re available during many seasons of the year now), and try turning them into little boats. Experiment with different sail sizes and types, and figure out how to make the candy boats go faster.

Learn more: Marshmallow Peep Boat Challenge at Lemon Lime Adventures

Launch plastic egg rockets

Put on some safety goggles and get ready for lift-off! This simple experiment uses Alka-Seltzer tablets to turn eggs into rockets.

Learn more: Easter Egg Rockets at The STEM Laboratory

Dissolve colorful turkey “feathers”

Baking soda and vinegar experiments are always popular, and this one is so cute for the Thanksgiving season. Build your own little turkey with baking soda feathers, then watch them foam up and dissolve when you add some vinegar.

Learn more: Turkey Feather Science at 123 Homeschool 4 Me

These science activities and experiments give preschoolers a chance to explore all sorts of science concepts, from plants and animals to germs and gravity and beyond.

Slice apples to learn about oxidation

Here’s another classic preschool science activity: using apple slices to learn about oxidation (and how to prevent it). When you’re done, you’ve got a tasty snack to eat too.

Learn more: Apple Oxidation at Teaching With Jennifer Findley

Show why sunscreen is important

First, have your students make four construction-paper people, each with varying conditions. Wrap one in plastic wrap, cover another in sunscreen, put a hat on one and a set of sunglasses on another. Ask kids to hypothesize what will happen when they’re left out in the sun, then see if they’re right!

Learn more: Sunscreen Experiment at 123 Homeschool 4 Me

Engage in some shadow science

Learn about animals and shadow science with these adorable and easy puppets. Use them to act out some scenarios involving these creatures in their natural habitats.

Learn more: Shadow Science at Little Bins for Little Hands

Mix up some “magic” milk

A drop or two of dish soap will make food coloring dance and swirl across the surface of a shallow bowl of milk. Preschool science experiments often seem like magic, but this one is all about surface tension and chemical reactions.

Learn more: Magic Milk at Laughing Kids Learn

See how easily germs spread

We love a preschool science experiment that reminds little ones of the importance of good handwashing. Help them see why it’s so important with this simple experiment that uses glitter to stand in for germs .

Experiment with wax paper

This wax paper experiment is interesting from both a science and art perspective. Ask kids to think about why wax paper behaves differently than other paper they use for art projects.

Learn more: Wax Paper Resist at Housing a Forest

Predict and observe what will melt in the sun

You’ll need a hot sunny day for this preschool science experiment. Help students choose a variety of items to place into a muffin tin and have them predict which ones will melt. Set the tin out in the sun for an hour or two, then bring it in and record your results.

Learn more: Melting Science at Frugal Fun for Boys and Girls

Drop balls to introduce gravity

Gravity can be a complicated subject, but all pre-K kids need to understand the basics. Drop balls of all sizes to discover that they all fall in the exact same way.

Learn more: Gravity Experiment at Inspiration Laboratories

Head to the playground to explore gravity and friction

What goes up must come down! A playground slide is the perfect place to help kids understand gravity. This is a good chance to learn about friction too.

Learn more: Playground Science at Buggy and Buddy

Test objects with magnets

Magnets are undeniably a source of fascination for kids. At this stage, you can worry less about explaining how magnets work and instead just let kids explore which items are attracted to magnets and which aren’t. Sort the items into categories, then see if the items have anything in common.

Learn more: Magnets at PreKinders

See sound waves in action

This series of simple experiments lets kids see sound waves at work. Start by making waves with a Slinky , then move on to tuning forks and bouncing confetti.

Learn more: Sound Experiment at Hands On Teaching Ideas

Make an orange volcano

Making erupting volcanoes is a staple of any childhood! We love this easy volcano experiment using an orange, baking soda, and vinegar.

Learn more: Orange Volcano at The Art Kit Blog

Grow delicious rock candy crystals

Preschoolers love science activities that involve food. While crystal experiments are a hit with kids of any age, this one is perfect for the young crowd. It requires a little patience, but kids get to eat the yummy results!

Learn more: Kool-Aid Rock Candy at Growing a Jeweled Rose

Move pom-poms with air pressure

Understanding the idea that air can have enough force to move objects can be a little challenging, but this simple experiment brings that concept to life. We love that this experiment is affordable since most people (especially teachers) already have these materials on hand.

Learn more: Air Pressure Experiment at Kids Activities Blog

Make a balance scale

This simple balance scale is so easy to make yet provides endless opportunities for weighing all kinds of objects. Have kids assemble a scale from a plastic hanger, a few paper cups, and some string, then let them hypothesize which items will be heavier and which will be lighter.

Learn more: DIY Balance Scales at Go Science Kids

Like these science activities for preschoolers? Don’t miss the 30 Best Educational Toys and Games for Preschool .

Plus, get all the latest teaching tips and ideas when you sign up for our free newsletters .

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At the Democratic Convention, a Historic Nomination

What story did the democrats tell about kamala harris and will it be enough to win.

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Last night, at the Democratic National Convention, Vice President Kamala Harris accepted her party’s nomination, becoming the first woman of color in U.S. history to do so.

Astead W. Herndon and Reid J. Epstein, who cover politics for The Times, discuss the story this convention told about Ms. Harris — and whether that story could be enough to win the presidential election.

On today’s episode

Astead W. Herndon , a national politics reporter and the host of the politics podcast “ The Run-Up ” for The New York Times.

Reid J. Epstein , who covers politics for The New York Times.

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Kamala Harris promised to chart a “new way forward” as she accepted the nomination.

“The Run-Up”: It’s her party now. What’s different?

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We aim to make transcripts available the next workday after an episode’s publication. You can find them at the top of the page.

The Daily is made by Rachel Quester, Lynsea Garrison, Clare Toeniskoetter, Paige Cowett, Michael Simon Johnson, Brad Fisher, Chris Wood, Jessica Cheung, Stella Tan, Alexandra Leigh Young, Lisa Chow, Eric Krupke, Marc Georges, Luke Vander Ploeg, M.J. Davis Lin, Dan Powell, Sydney Harper, Michael Benoist, Liz O. Baylen, Asthaa Chaturvedi, Rachelle Bonja, Diana Nguyen, Marion Lozano, Corey Schreppel, Rob Szypko, Elisheba Ittoop, Mooj Zadie, Patricia Willens, Rowan Niemisto, Jody Becker, Rikki Novetsky, Nina Feldman, Will Reid, Carlos Prieto, Ben Calhoun, Susan Lee, Lexie Diao, Mary Wilson, Alex Stern, Sophia Lanman, Shannon Lin, Diane Wong, Devon Taylor, Alyssa Moxley, Olivia Natt, Daniel Ramirez and Brendan Klinkenberg.

Our theme music is by Jim Brunberg and Ben Landsverk of Wonderly. Special thanks to Sam Dolnick, Paula Szuchman, Lisa Tobin, Larissa Anderson, Julia Simon, Sofia Milan, Mahima Chablani, Elizabeth Davis-Moorer, Jeffrey Miranda, Maddy Masiello, Isabella Anderson, Nina Lassam and Nick Pitman.

Astead W. Herndon is a national politics reporter and the host of the politics podcast “The Run-Up.” More about Astead W. Herndon

Reid J. Epstein covers campaigns and elections from Washington. Before joining The Times in 2019, he worked at The Wall Street Journal, Politico, Newsday and The Milwaukee Journal Sentinel. More about Reid J. Epstein

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