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

This science fair project idea produces varying pitches of sound.

This science fair project creates a visual model of whatâs happening to sound waves as a car approaches and then leaves.

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

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

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.

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.

Believe it or not, images that are cast upon your eye's light-sensitive screen (called the retina) are upside down. Here's a fun, fast experiment to prove it!

Wondering how we know that air is there? Here's a quick and easy experiment that proves that air may be thin, but it's not too wimpy to block your shot!

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

Here's a fun activity that will introduce your fourth grader to the concept of frictionless motion by constructing a hovercraft.

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.

Introduce your child to the amazing, almost magical phenomenon of static electricity!

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

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

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

Help your fifth grader execute this experiment involving a lit candle (submerged in water!) to show him the wonders of heat energy transference.

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

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

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

In this fun activity, your child will create their very own solar oven to bake s'mores!

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!

This is a quick, easy science fair project that conveys the idea of density to upper elementary students.

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

An home science experiment for older students that teaches about the science behind heat.

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

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.

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

How do mirrors work? What is light, and how does it travel? Explore light and reflection with your preschooler with these simple hands-on experiments.

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