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Preschool Science Experiments

Experiments and Activities for Preschoolers

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This is a collection of fun, easy and educational science experiments and activities for preschool students.

Bubble Rainbow

Make a bubble rainbow with a water bottle, old sock, dishwashing liquid and food coloring.
Anne Helmenstine
Use household materials to blow a colored bubble tube or "snake". Use food coloring to tint the bubbles. You can even make a bubble rainbow.

Make a Bubble Rainbow

Hand Washing Glow

Irish Spring soap glows a bright greenish-blue under a black light.
Anne Helmenstine
Hand washing is an important way to keep germs at bay. How well do preschool kids wash their hands? Let them find out! Get a soap that glows brightly under a black light. Laundry detergent glows. So does Irish Spring. Have the kids wash their hands with soap and water. Afterwards, shine the black light over their hands to show them the spots they missed.

Rubber Bouncy Egg

If you soak a raw egg in vinegar, its shell will dissolve and the egg will gel.
Anne Helmenstine
Soak a hard-boiled egg in vinegar to make a bouncy ball... from an egg! If you are brave enough, soak a raw egg instead. This egg will bounce too, but if you throw it too hard, the yolk will splatter.

Make a Rubber Egg

Bend Water

Charge a plastic comb with static electricity from your hair and use it to bend a stream of water.
Anne Helmenstine
All you need for this project is a plastic comb and a faucet. Charge the comb with electricity by combing your hair and then watch as a thin stream of water moves away from the comb.

Bend Water With Static

Invisible Ink

After the ink has dried an invisible ink message becomes invisible.
Comstock Images, Getty Images
You don't have to be able to read or write words to enjoy invisible ink. Draw a picture and watch it disappear. Make the image reappear. Several non-toxic kitchen ingredients make great invisible ink, like baking soda or juice.

Make Invisible Ink

Slime

Slime is a fun and easy chemistry project for all ages.
Nevit, Creative Commons License
Some parents and teachers avoid slime for preschool kids, but there are so many non-toxic slime recipes that it's really a terrific project for this age group. A basic slime can be made with cornstarch and oil, plus there are forms of slime that are meant to be eaten, like chocolate slime.

Find a Slime Recipe

Finger Painting

Finger paints are a great way to explore color and mixing.
Nevit, Creative Commons License
Finger paints may be messy, but there they are a fantastic way to explore color! In addition to the regular type of finger paints, you can add food coloring or tempera paint to piles of shaving cream or whipped cream or you can use finger paints made especially for tubs.

Iron in Cereal

Breakfast Cereal with Milk
Scott Bauer, USDA
Breakfast cereals are fortified with vitamins and minerals. One of the minerals that you can see is iron, which you can collect onto a magnet for kids to examine. It's an easy project that causes kids to stop and think about what is in the foods they eat.

Get Iron From Cereal

Make Rock Candy

This blue rock candy is practically the same color as the sky.
Anne Helmenstine
Rock candy consists of colored and flavored sugar crystals. Sugar crystals are terrific crystals for young kids to grow because they are edible. The two considerations for this project are that the water has to be boiled to dissolve the sugar. That part should be completed by adults. Also, rock candy takes a few days to grow, so it is not an instant project. In a way, this is more fun for kids, since each morning they can get up and monitor the progress of the crystals. They can break off and eat any rock candy growing on the surface of the liquid.

Make Rock Candy

Kitchen Volcano

Adding baking soda causes the volcano to erupt.
Anne Helmenstine
You wouldn't want your preschooler to grow up without ever having made a kitchen volcano, right? The basics involve baking soda and vinegar in just about any container. You can make a model volcano from clay or dough or even a bottle. You can color the "lava". You can even make the volcano emit smoke.

Make a Kitchen Volcano

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