This science fair project idea investigates which objects float and sink in honey, water, and oil.

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

How sensitive is your skin? Here's a fourth grade science experiment that lets your child figure it out.

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

Ready for takeoff! Make science fun and teach about levers and fulcrums as your child sends buttons flying.

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

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

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

Deck the halls with last season's Christmas lights for a spectacular and electrifying science activity.

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

What is elasticity? Students will investigate how this concept applies to bouncing ball physics by testing the bounces of balls made out of different materials.

Show your child that the simplest ingredients (salt and water) can be used to illustrate the concept of density!

This science fair project idea produces varying pitches of sound.

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.

Make water and clay play a little more scientific with this hands-on experiment that teaches displacement and shows how an object's shape affects its buoyancy.

This science fair project idea explores the relationship between oil and water in terms of density as well as hydrophilic/hydrophobic compounds.

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

Explore the chemistry of latex polymers with this outrageous, hilarious science activity.

In this science fair project, kids start a chemical reaction that will make a balloon inflate itself!

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

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.

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

This science fair project idea explores whether talking to a plant will help it grow.

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

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

Along with being an interesting science activity, dehydrated strawberries are also tasty â and healthy!

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

How does rust form? Kids will learn about the roles oxygen, water, and electrons play in rust chemistry in this cool science fair project idea.

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

Chemistry isn't just incredible ... sometimes its edible! These crystal lollipops are a delicious introduction to chemistry concepts.