In this science fair experiment, students learn about the scientific principles behind Doppler ultrasound.

Determine the relationship between the speed of a sound and the temperature of the air it passes through.

In this science fair project, young children discover what happens when two fluids that have different densities get together.

Teach your kids about entropy with this fun, easy exercise, and teach your money to dance while you're at it!

It's easier than you think to make homemade play dough -- just a few pantry staples makes a natural version of the toy that kids have loved for generations.

Learn how to make marbleized paper with simple everyday ingredients in this fun activity! Your child will learn about oil and water while doing this project.

Help your child understand surface tension by showing them how they can create a "skin" on top of water.

Show your teen how to make her own beeswax lip balm. It's one of the simplest do-it-yourself activities, and it's fun to make!

This activity is a great introduction to polymer chemistry. It might seem complicated, but all you'll need is the material found inside of a baby's diaper!

Make your own marshmallows and mix up some very interesting third grade chemistry lessons while you're at it!

Demonstrate how we are able to locate sounds, echolocation. Have a blindfolded subject locate you by the sound of your clapping.

Using simple materials found around your home, you can reinforce the static electricity concept by helping your child build a simple device with zapping power!

Put a twist on traditional oil painting with this fun science activity that you and your first grader can do together.

The objective of this experiment is to identify common materials that absorb sound waves with the greatest efficiency.

Set your teen on the beat in a real world "crime scene" investigation. Can he tell whose fingerprints are on a drinking glass?

What is the Doppler Effect, or the Doppler Shift? The purpose of this science fair project is to determine how distance impacts the Doppler Effect.