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

Science fair project that examines what causes thunder and why a thunderclap sounds so loud. How is lightening related to the creation of sound waves?

This classic children's game demonstrates how sound travels through air vs. through a solid.

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

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.

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.

How does the size of a vibrating surface affect the pitch of a drum? Learn about drum size and pitch with this easy science fair project idea.

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

Using a toy race car kids create a visual model of the Doppler Effect.

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

Take a closer look at your furry friend (or the furry friend of a neighbor -- with permission) to discover if communication exists between cats and humans.

This play-activity causes young children to focus on and become more aware of their sense of hearing and the power of their ears.

This science fair project idea explores whether talking to a plant will help it grow.

Can you dig it? This science experiment isn't for kids who like to keep their hands clean.

It's rhyme time! With this science fair project idea, your child will find out which words can be considered easy rhyming words, and why.

Here is a fun middle school science project on factors affecting solubility. Learn how dissolved solids can "crash out" to form crystals when conditions change.

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

What keeps a an item cooler, polymer crystals or ice? Find out in this cool science experiment!

This biodiversity project examines the biodiversity in your own backyard.

Collect meteorite dust with a magnet in your very own backyard! The objective of this science fair project is to gather meteorite dust to study outer space.

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

Do you think you could walk around upside down -- with your feet in the air and your head on the ground?

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

Start your toy engines -- this is going to be a fast and friction-filled race!

In this physics project, learn about the relationship between light intensity and distance using a laser pointer, flashlight, and graph paper!

Can a toy car determine the strength of a magnet? In this cool magnet science fair project, young scientists will learn how to measure the strength of a magnet.

Kids will learn how to show the direction of magnetic field lines and create a permanent model using iron filings in this great science fair project idea.

Do earthworms like moisture or darkness? Find out as we explore the relationship between earthworms and light.

The objective of this science fair project is to examine the effects of temperature on salt and water solutions, as they form crystals over time.