Find a mathematical relationship between the intensity of a sound wave and distance from the sound source. Use a pedometer and a sound level meter.

Let your fourth grade chef mix up butter and sugar with scientific principles about different states of matter, and get delicious toffee, too.

Illustrate the idea of light refraction with this exciting and mystifying experiment.

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

Discover the force of water! This article provides step-by-step instructions for creating your own science experiment.

This science fair project demonstrates the principles of reflection through simple experiments involving mirrors and light.

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

Delight your budding scientist with this cool physics magic trick and teach her some basic physics concepts while you're at it!

Teach your child how butter is created by shaking up cream the old-fashioned way.

Here's an experiment that will have your child experimenting with cake ingredients to learn about the chemical reactions that happen when a cake's in the oven.

Make stunning pendulum waves and learn the math behind the patterns generated with this cool and easy science project.

Use reusable, recyclable materials--along with a dose of imagination--to build a castle with first grade geometrical forms.

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.

Make a DIY golf putter and design your own golf putting course in this 2nd-3rd grade arts and crafts/game activity.

Help your kid feel like a superhero with this safe and fun science experiment that creates an electrical charge that's like a mini lightning bolt!

What happens when colored beams of light mix? You might be surprised.