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.

Take this "paper plate snack test" with your child for a hands-on lesson in making healthier choices to teach your child about what's in his food.

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

Show your kids the power of baking powder by conducting a simple experiment. Make four batches of cornbread, all identical except for one thing: baking powder!

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

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

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

This homemade barometer allows your little scientist to contemplate and compare different air and weather conditions.

What causes sound? Here's a simple science experiment that adds a visual element to the science of sound to help kids better understand this tricky concept.

This science fair project idea produces varying pitches of sound.

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

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

Make your own helicopter using a paper clip and a sheet of paper. Hold the spinner up in the air, let it go, and watch it spin gracefully to the ground.

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

This easy aerodynamics activity is a simple way to introduce kids to the scientific method.

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

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

Engineers in training can get started with this simple wheel-and-axle construction activity.

Has your kid noticed how much bigger the moon looks when it's low in the sky? Here's an activity you can do to show them that it's just an optical illusion.

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.

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

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.

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

This surprisingly good glue recipe comes from common kitchen items.

Let your young scientist explore a brave new world of sound with an experiment that just requires a handful of common household items.

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

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

Inspire your child to put on her engineer hat for the day, as she builds her very own, double-decker bridge.