Here's a fun math and science activity: help your child explore four different kinds of measurement, using their hand and a few simple household tools.

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!

Invite your fifth grader to test the different rates of liquid absorption in synthetic and cotton materials, such as nylon and cotton.

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.

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.

This simple "how to make a water wheel" activity makes physics come alive for your child by demonstrating how different kinds of energy work.

Here's a science experiment that gives your kids a chance to see how fire needs oxygen to burn, with a little math and writing practice thrown in.

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

Chemistry is a blast with this backyard bomb made from a sandwich bag. All you need are ingredients from the pantry to create a satisfying, and safe, explosion.

Give your budding young observers a chance to discover simple machines at use in their own home.

Children combine an acid and an alkaline substance to simulate a volcano eruption in this fun experiment.

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.

Help your kindergarten scientist discover relative size, density, and buoyancy with this fun, pumpkin science project!

Help your kindergarten scientist understand the concept of surface tension with this simple science experiment.

Create a homemade pair of sunglasses with colored lenses to see just how light and color affect our sight! Use this fun project to practice science!

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

Get your fifth grader involved in some earth science by helping her plan and create her very own rock collection.

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.

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

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

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

This fun marbled paper craft uses things you're likely to have around your house, and it teaches kids some simple chemistry too!

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!

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

This taste buds science experiment demonstrates how strongly our sense of smell controls what we taste.

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

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

Take advantage of the fact that ink and water don't mix and introduce your kid to suminagashi, a Japanese form of art.

This experiment that explores water and air pressure will amaze your fifth grader as it appears that a single card is holding water in an upside-down glass.