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

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

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

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

Create a DIY Electromagnet! Using a 9v battery to create an electrical field around a nail, students explore electromagnetism in this cool science project idea.

This science fair project idea explores the different properties & interactions of sugar molecules.

This science fair project idea investigates how the height at which a pendulum is released affects the length of time it continues.

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

This science fair project idea produces varying pitches of sound.

The objective of this science fair project is to examine the basic principles of air pressure using simple materials like a balloon, straw and string.

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.

Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!

Is it amplitude? Weight? Length of string? Kids will discover what factors changing the period of a pendulum depends on in this fun and easy physics experiment.

This science fair project explores how osmotic pressure forces water through the root up into the plant.

In this science project, learn about water transport in plants and make a beautiful dyed floral arrangement with cohesion, adhesion, and xylem tubes!

This science fair project idea explores whether it is easier to balance on a narrow ledge or on a rope.

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

Learn about the microclimate of your backyard by tracking rainfall, temperature, and observed weather with hand drawn charts and graphs.

This science fair project idea investigates how the shape of an object affects drag.

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.

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?

Science fair project examining barometric pressure, and how it can be used to predict the weather. How does atmospheric pressures relate to weather conditions?

What's the best way to make DIY compost? Kids will learn about aerobic and anaerobic decomposition while learning to appreciate the value of composting.

Explore how dielectric heating comes into play when microwaving various liquids in this science project. This test will help you understand how microwaves work!

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

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

Explore how sound waves are reflected and absorbed by producing echoes. Analyze which locations produce echoes.

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

In this project, build an insect model that shows how the head, thorax, and abdomen fit together! Learn insect anatomy by constructing a paper mache critter.

Check out this cool science fair project idea that models the behavior of the cold desert plants: xerophytes and halophytes.