Show your child how and why the microwave works, while demonstrating just how strangely foods can behave while inside the crazy cooker.

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.

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.

What causes sound? Here's a simple science experiment that adds a visual element to the science of sound to help kids better understand this tricky concept.

Discover whether different amounts of water added into a wine glass will produce a different pitch when their fingers are rubbed along the rim.

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

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

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

An home science experiment for older students that teaches about the science behind heat.

This science fair project idea produces varying pitches of sound.

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

Has your child ever asked you how a submarine works? Here's a simple bathtub project that will make for a hands-on answer.

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

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

When you see those sunscreen "protection levels," what does that really mean? Try this experiment to find out.

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

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

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

In this fun activity, your child will create their very own solar oven to bake s'mores!