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

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

Learn to solve a crime scene investigation using an important forensics tool: oblique lighting.

In this physics project, learn about the relationship between light intensity and distance using a laser pointer, flashlight, and graph paper!

Amaze your kids by separating a salt and pepper mixture using an "electric spoon" charged with wool.

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

This 4th of July, explore fourth grade science and make some safe fireworks in your own backyard using soda pop!

Make your own helicopter using a paper clip and a sheet of paper. Hold the spinner up in the air, let it go, and watch it spin gracefully to the ground.

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

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

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

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.

Inspire your child to put on her engineer hat for the day, as she builds her very own, double-decker bridge.

On the next chilly, winter day, invite your fifth grader to make a hand warmer by experimenting with the loaded combination of a few natural ingredients.

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.

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

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?

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

Take a look at forensic science with your child. She'll learn how to take a shoe impression, just like the detectives do!

Hone your child's skills of observation and take a look at forensic science for an interesting afternoon of exploration and detective work!

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

Household items and a bit of imagination will create a CSI kit for your child to have investigative adventures with. Explore the world of forensic science!

Looking for an enjoyable evening activity you can do with your kids? Study the stars: help them learn about constellations by making one of their own.

What's a liquid? What's a solid? What better way to experiment than by turning a childhood favorite, ice cream, into a homemade science lesson!

Would your child like to learn about a hidden world? All she needs to do is open her box of markers!

How powerful is the reaction between baking soda and vinegar? Find out here!

What is it about a Slinky that causes it to walk down the steps? This simple experiment is a perfect illustration of both gravity and momentum.

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

Try this chemistry experiment with your curious kid and get some "shocking" results!

This science fair project idea produces varying pitches of sound.