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An hour glass, also known as a sand clock, keeps time. In this activity, your child will make her own sand clock and measure the time it keeps.

Excite your fourth grader by recreating ancient Viking myths. This miniature longboat will explore the principle of water molecules expanding when heated.

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

Your kid can learn about the process of making frozen yogurt and enjoy a homemade, flavorful dessert. Experiment with this fun, chilly food!

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

This science fair project idea produces varying pitches of sound.

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

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.

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

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

Popsicles aren't just for the summertime, this activity takes cold and turns it into a creative and tasty science experiment.

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

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

Give your child an introduction to food preservation by making and canning your own yummy, homemade pasta sauce!

These flying potato poppers make a cool sound, create a celebratory mood, and they can teach your child about the power of air pressure.

Show your child how and why the microwave works, while demonstrating just how strangely foods can behave while inside the crazy cooker.

Get your hands on a concoction that breaks the rules about what's a solid and what's a liquid.

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

Encourage your child to think outside the bathtub by making her very own handmade soaps! Perfect as a present, a decoration, or just to pamper herself.

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!

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.

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 explores whether talking to a plant will help it grow.

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

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

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