This project compares the strength of one, two, and three-ply toilet paper.

In this activity, your child will be challenged to create a device that protects an egg when it is dropped from a height of about 10 feet.

Examine which metal conducts more heat by boiling water in 3 pans made of aluminum, copper, and stainless steel.

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

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 do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

Find out whether putting something on top of a plant will inhibit its growth.

Examine whether distilled water, spring water, or regular tap water yield faster plant growth.

This science fair project idea determines if the color of light affects the growth of plants.

Find out whether packaged seeds actually do expire in this new science fair project idea.

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

How do organic materials become soil? This science experiment measures what materials biodegrade.

Young scientists will investigate people's preferences for saltiness, and make some inferences about genetics and diet.

This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched.

The purpose of this science fair project is to study the properties of sugar and examine individual preferences for sugar and other sweeteners.

In this outdoor science activity you'll find tips on how to create a nature journal by choosing a native plant or animal and tracking that species.

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

How well can people recall what they have observed. Test your knowledge in this fun experiment.

This science fair project idea investigates whether plants can survive being frozen.

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

Determine whether butterflies like to drink sugar water, salt water, or plain water.

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

Does skin thickness really decrease fruit spoilage? Find out in this science fair project idea!