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.

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

Has your kid noticed how much bigger the moon looks when it's low in the sky? Here's an activity you can do to show them that it's just an optical illusion.

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

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.

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

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

Kids will conduct a cool limewater carbon dioxide test that can be performed with common household materials to learn about the chemistry of this common gas.

How do we know that air exists when we can't see it, taste it, or touch it? Here's a classic experiment that will teach your kid some basics of aerodynamics!

This science fair project idea demonstrates sonar mapping of the ocean floor.

If your fourth grader is obsessed with all things glow-in-the-dark, then here's an activity that will really light up her imagination!

Show your kids the power of baking powder by conducting a simple experiment. Make four batches of cornbread, all identical except for one thing: baking powder!

Try the classic balloon-on-the-wall trick with your kid and watch static electricity in action.

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

The purpose of this science fair project is to build a basic radio.

This science fair project idea produces varying pitches of sound.

Here is a nifty science experiment using Epsom salts to make "frost" appear on a piece of glass.

How to test for acids and bases? In this activity you and your child can make your own indicator from red cabbage!

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

Take this "paper plate snack test" with your child for a hands-on lesson in making healthier choices to teach your child about what's in his food.

Have your child try this classic experiment that demonstrates circular motion using a bucket and rope. Be careful, you might get soaked!

This experiment will explore how mallets of various materials and weight create sonic tones of varying lengths.

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

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

This science fair project idea studies how talking on a cell phone affect driving?

Bring the magic and mystery of the night sky to the light of day with this fun constellation art project!

Here is a quick experiment you can conduct at the playground to introduce or reinforce the concept of Newton's First Law, The Law of Inertia.

Is it solid or liquid? Create oobleck and witness the amazingly weird oscillation between the two!

The pinwheel is a simple toy that has been around for years and uses the wonders of the wind to spin it and delight kids of all ages!

Students pit the heat capacity of water against the heat capacity of oil while looking at the effects of dipole rotation in this cool science fair project idea.