Preschool - 4th Grade Science Activities

Explore scientific concepts with this experiment that introduces kids to the scientific method!

In this science fair project, kids start a chemical reaction that will make a balloon inflate itself!

Use pepper and soap to discover some fun facts about the properties of water.

Kids will conduct a cool limewater carbon dioxide test that can be performed with common household materials to learn about the chemistry of this common gas.

Check out this fun science fair project to make a vinegar and baking soda balloon and demonstrate how gas is created as a result of the chemical reaction.

What is elasticity? Students will investigate how this concept applies to bouncing ball physics by testing the bounces of balls made out of different materials.

This science fair project idea determines what household items are good conductors of electricity.

This science fair project idea explores the different properties & interactions of sugar molecules.

Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

In this fun science fair project idea, kids will experiment with various methods in order to discover the fastest way to cool a soda.

In this activity, children will let their imagination run wild as they design and build a new planet in the solar system.

4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.

Your child will create her own falling snowflakes using white paper and glue them over a tree, so it appears as if they are falling from the sky.

In this Halloween-themed activity, young learners will find out what happens when they mix two household items together to create a surprising chemical reaction.

In this activity, your child will be asked to create a boat that can successfully float while holding 25 pennies.

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

This science fair project idea experiments with spinning color wheels and optical illusions.

Does the temperature of a magnet affect its strength? Learn about the relationship between magnets and temperature with this cool physics science fair project.

Kids learn how to manipulate additive and subtractive colors to send secret messages with red colored filters in this cool science fair project idea.

Tired of gum with flavor that lasts for just a couple of minute? Put gum to the test with this chewy science experiment!

Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!

What are the effects of fertilizer on plant growth? What's the best fertilizer type (solid, liquid or powder)? Kids find out in this science fair project idea.

In this fun science fair project idea learn about universal solvents and solutes and find out the solubility of several common liquid substances.

Use chemical analysis to identify a variety of mystery powders that look the same but actually have very different properties.

This science fair project teaches about mold. Students will test different foods to see which grow mold the fastest.

Start your toy engines -- this is going to be a fast and friction-filled race!

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

This season is a great time to explore the many shapes, sizes, and species of evergreen trees. Download our "field guide" activity and learn more!

This science fair project idea determines if the temperature of rubber effects how high it bounces.

Children will learn all about cause and effect as they experiment with potion-making in this Halloween themed activity.