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

This science fair project idea produces varying pitches of sound.

This science fair project idea experiments with spinning color wheels and optical illusions.

This science fair project idea produces sounds by creating vibrations using different objects.

In this science fair project, kids start a chemical reaction that will make a balloon inflate itself!

This is a quick, easy science fair project that conveys the idea of density to upper elementary students.

This science fair project idea investigates which objects float and sink in honey, water, and oil.

Help your child understand the scientific concept of evaporation with this fun outdoor science activity.

Help your child experiment with the combination of acid and baking soda by making these homemade bath bombs!

This science fair project idea explores the relationship between oil and water in terms of density as well as hydrophilic/hydrophobic compounds.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

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

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.

Have your child build his own mini waterfall, and help him develop his planning, problem solving, and architectural skills.

Help your child explore chromatography, which is the process of separating colors or pigments, and create a neat art project in the process!

In this fun science fair project idea learn about universal solvents and solutes and find out the solubility of several common liquid substances.

How does rust form? Kids will learn about the roles oxygen, water, and electrons play in rust chemistry in this cool science fair project idea.

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 science fair project creates a visual model of whatâs happening to sound waves as a car approaches and then leaves.

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

Your child will do a fun science experiment using soap and pepper flakes to help understand the concepts of water molecules and the surface tension of water.

Here's a fun math and science activity: help your child explore four different kinds of measurement, using their hand and a few simple household tools.

Before your treat your child (and yourself!) to a yummy snack, help her learn a little about Sir Isaac Newton's First Law of Motion!

Help your child get a grasp on what it was like to build gigantic ancient structures with this easy engineering activity about science and physics.

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.

This trick uses vertical and horizontal forces to help your child to push apart your hands apart, no matter how hard you try to keep them together!

Introduce your child to the amazing, almost magical phenomenon of static electricity!