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.

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.

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

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.

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

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

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.

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

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

Set your young chemist up for an afternoon of science-fueled magic with a deceptively simple activity starring baking soda and vinegar!

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

Here's an experiment that will have your child experimenting with cake ingredients to learn about the chemical reactions that happen when a cake's in the oven.

In this activity, you'll not only make your own bouncy balls at home, but your child will also learn how polymers are made.

How do series and parallel circuits work, and which produces the brightest light in a light bulb? Construct both in this project and find out!

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.

Teach your child some scientific basics as you explore the densities of various liquids in this fun experiment.

Check out this mind-blowing experiment in which a hard-boiled egg will fit through an impossibly small opening with the help of only a few matches!

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

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

Experiment with buoyancy to learn how a submarine rises and sinks in this classic science experiment.

Learn with makes water molecules work with this fun and easy science activity!

Sink or swim? Calculate the density of various fruits and vegetables using water and a kitchen scale.

Help your child understand surface tension by showing them how they can create a "skin" on top of water.

Here is a quick experiment you can conduct at the playground to introduce or reinforce the concept of Newton's First Law, The Law of Inertia.

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

Want to make Halloween truly eerie? Science to the rescue! These ghouly hands come alive with a little help from simple chemistry.

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.

Every time a sound is produced it emits a sound wave. This experiment demonstrates how sound travels, using nothing more than a spoon and a string!

This science fair project demonstrates the principles of reflection through simple experiments involving mirrors and light.