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

In this exciting design challenge, your child will use design thinking skills to create a mixture that can inflate a balloon.

In this fun design challenge, your child will get creative with making structures out of toothpicks and gumdrop candies.

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

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

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

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.

In this science and engineering activity, children will explore types of tunnels and their purposes and then design and build a tunnel of their own.

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

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

Help your fifth grader execute this experiment involving a lit candle (submerged in water!) to show him the wonders of heat energy transference.

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

Discover how and which salt melts ice the quickest.

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.

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.

Make a spring collage with your child to get them outside and those creative juices flowing!

Students will investigate the thermal conductivity of metals by learning how to measure thermal conductivity with this fun and easy science fair project idea.

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.

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

What's the relationship between temperature, air humidity and static electricity? Kids will find out with this free static electricity science fair project.

Make your own greenhouse - out of a balloon! Your child will learn how greenhouses work as they plant radish seeds and watch them grow.

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.

What causes the seasons to change? Kids find out by modeling the earth's tilt using a globe, flashlight and graph paper in this cool science fair project idea.

Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!

Kids will learn some cool stuff about chemical reactions by determining what happens when you mix different concentrations of hydrogen peroxide and yeast.

Let your fourth grade chef mix up butter and sugar with scientific principles about different states of matter, and get delicious toffee, too.

In this simple science project, learn about what causes dew and what affects dew formation with a drinking glass, ice, and a soda bottle.

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

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