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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 whether it is easier to balance on a narrow ledge or on a rope.

What are the benefits of good posture? Kids will learn about the cognitive effects of good posture through conducting and observing a controlled experiment.

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

This project determines the age of a tree using a growth factor chart instead of cutting the tree down to count the rings in its base.

Wonder why bugs always fly around your lights at night? This experiment determines whether insects are attracted to the heat or the light.

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

This easy and inexpensive paper towel science project introduces kids to important physical concepts like cohesion, adhesion, and capillarity.

This project explores ways to prevent static electrical shocks.

In this science fair project, apply the principles of leverage and force by building six simple machines designed to set weights in motion.

This science fair project idea determines the most effective method of preserving food.

What is mulch? Kids will provide soil with a wet blanket of mulch and see if that helps keep drought-stricken soil damp.

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

Ant behavior is closely related to light intensity. This free science fair project idea examines how fast ants dig when they are exposed to to light and dark.

Science fair project that compares the ecology of different soil samples by identifying which sample has the most invertebrates living in it.

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

This science fair project idea builds models of various types of bridges and then determines which bridge design is the strongest.

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 determines what household items are good conductors of electricity.

In this science fair project, learn how to make gears and find out why they transmit torques in predictable ways.

The goal of this golf science fair science fair project is to determine whether the temperature of a golf ball affects its elasticity and its rebound.

Examine the effect of pressure on carbonation in soda.

In this science fair project, we'll use a liquid crystal thermometer to find out whether exercising makes a difference in people's temperature.

This science fair project idea explores the egg's thin membrane.

This project explores whether plants can live and grow when "watered" with juice, soda, or milk.

Most people assume that cold water freezes more quickly, but could that be false? Does hot water freeze faster than cold water? Let's find out!

In this science fair project, students discover how sedimentary layers form as sediments like mud, silt and sand settle over time.

Have your child kick off their summer vacation by making a miniature water slide!

Science fair project which determines whether plants are able to get enough nutrients from different types of garbage.

Kids get step-by-step instructions for how to make a rubber band car and explore the physics of potential energy with this fun engineering science fair project.