Crayons aren't just good for creating colorful masterpieces -- they're also great for science!

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

This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

This science fair project idea investigates the difference in reaction times between boys and girls.

Did you even wonder why some rocks are round and smooth while others are broken up into small pieces?

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

In this pinto bean germination experiment, you'll learn about how fertilizer aids in growing pinto beans into seedlings.

Before you get ready for a delicious scramble or omelet, add a bit of science to your morning routine!

In this sound experiment children listen for differences as they tap on a bag of air, a bag of water, and a wooden block held up to their ears.

This science fair project idea identifies trees using a dichotomous key.

Learn about sound physics and do a survey experiment to explore the difference between sound and noise in this science project.

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 determines if the temperature of rubber effects how high it bounces.

This science fair project looks one of the most important factors affecting seed germination: water. A fun and easy plant biology experiment for 3rd graders.

Gather some friends for a bubbly soda taste test do determine calories' role in your favorite drinks.

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

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.

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

This is a fantastic and easy science experiment where kids will learn about elasticity by testing how high bouncy balls of different materials can bounce.

In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.

How does a compass work? What's a magnetic field? Kids will build their own compass at home to find the answers in this great science fair project idea.

This simple heat transfer experiment is a great introduction to the concepts of heat transfer and conduction.

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

Science fair project which determines whether the size or the thickness of a piece of paper has an effect on how many times it can be folded in half.

Learn how to make a ping pong ball anemometerâa device used to measure wind speedâin this free science fair project idea.

Have you ever seen fruit decay? Find out if a fruit will rot faster if you open it versus leaving it untouched!

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

Observe corn seed germination to learn about dicots and monocots and how plants grow from seeds to seedlings to full-grown plants!

Create a homemade pair of sunglasses with colored lenses to see just how light and color affect our sight! Use this fun project to practice science!

This science fair project teaches students about wilting and browning of salad greens.