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Using a toy race car kids create a visual model of the Doppler Effect.

Kids will learn how to show the direction of magnetic field lines and create a permanent model using iron filings in this great science fair project idea.

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

When you cut a flower to put into a vase, it'll eventually wilt, even with water and sunshine. But is there another scientific secret to keeping flowers fresh?

This science fair project idea investigates if webbed feet help a duck (and others) swim.

When you rub a balloon on your head, your hair stands up; but is that true for everyone? Does hair color affect static electricity?

Is it a square or a circle? See if you can trick your friends with this zany science project!

This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

Science fair project that determines whether lettuce that is harvested gradually yields more produce than lettuce that is harvested all at once.

This project determines whether Styrofoam, paper, or plastic cups are best for preventing ice from melting.

How does water pressure change with depth? Kids learn how pressure works underwater with this cool and easy demo.

This science fair project idea explores how length affects the weight a bridge can hold.

How does dishwashing liquid work? Kids discover the chemical mechanism behind cleansing power in this easy science fair project idea.

How does the size of a vibrating surface affect the pitch of a drum? Learn about drum size and pitch with this easy science fair project idea.

Science fair project that examines condensation and the conditions needed in order for dew to form.

Plants and light seem to be good buddies, but how far does the friendship really go?

In this project children practice the scientific method while playing with puffy paint.

This science fair project examines how seeds hitchhike on animals and clothing.

Can you imagine a sky filled with bright, colorful bubbles? Make this whimsical scene come alive with bubble science!

Kids will learn how to make a thermometer to to explore liquid density in this great science fair project. Which liquids are affected by temperature the most?

Find the North Star, and measure your latitude! The purpose of this science fair project is to find latitude and learn about geographic locations.

In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.

This project examines whether people's taste perception is influenced by what they see.

Get down to the rubber with this science project that tests the effectiveness of different types of erasers.

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

How can we describe the relationship of magnetic field strength vs. distance? Kids will find out with this free science fair project idea.

In this fun science experiment, kids will determine the best method for ripening avocados and discover the cool chemical reaction that makes this possible.

This science fair project idea determines which method of hand cleansing is the most effective.

Be a chemist for a day and study the simple reaction between sugar and heat. Try heating sugar and see what happens!