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What's a crater, and how does it happen? Here's a kindergarten experiment with safe, nontoxic ingredients.

Experiment with magnetism in this 8th grade science activity in which your child will create a working compass using a steel needle, magnet, and jar.

What happens when eyes see something that the brain knows cannot be true? In this science activity, the brain has to "fudge" it when interpreting what you see.

In this project students experiment with making music using only glasses of water.

Kids love the dramatic Mentos and Diet Coke experiment conducted in this awesome science fair project.

Help your fifth grader trace your family's roots and interview all the living mothers to create a makeshift, 3-D family tree!

Science fair project that uses distillation to convert salt water into fresh water.

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

This science fair project idea explores how much force is needed to move a lever at different distances from the fulcrum.

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

This fun, think-outside-the-box activity introduces kids to gravity and other basic scientific concepts as they construct an impressive marble run!

Science fair project which uses coins flips to visually demonstrate the probability of an event and how to express it.

Why do ants like sugar? Do ants like artificial sweeteners too? Kids find out with this great inquiry-based science fair project.

This fun activity makes use of pasta shells, paint, and glue make a crab while your child learns about this unique creature.

Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.

Chemistry is a blast with this backyard bomb made from a sandwich bag. All you need are ingredients from the pantry to create a satisfying, and safe, explosion.

This project investigates whether chewing gum can help a majority of people with focus and concentration.

Making your own glass cleaner is easy, effective and inexpensive!

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

This science fair project idea demonstrates how air resistance contributes to denser objects falling faster than less dense objects.

How sensitive is your skin? Here's a fourth grade science experiment that lets your child figure it out.

This project examines whether humans can intuitively grasp numeric values greater than three.

Science fair project that determines whether landscaping fabric impacts the ability of plants to receive water.

With this hands-on activity, you'll show how fall colors are hidden in the leaf all year long!

In this science experiment, test the pH of soil surrounding a gas station to determine if gas stations have a negative effect on the environment.

Kids will learn how to measure the viscosity of liquids by making their own homemade viscometer in this great science fair project idea.

This science fair project idea examines whether people can decode scrambled messages.

This science fair project idea explores whether a person's ability to see under very dim lighting conditions diminishes with age.

Wind is an important source of renewable, green energy. The purpose of this science fair project is to build and operate a windmill generator.

Check out this cool science fair idea on why hard fruits become soft and learn how to compare the sugar content between ripe and unripe fruits.