This science fair project idea determines if crystals will absorb food dye and if colors will mix by the process of diffusion.

Help your young scientist celebrate the wonders of the night sky in the comfort of your own home.

With this hands-on activity, you'll show how fall colors are hidden in the leaf all year long!

In this activity, your child will be challenged to create a device that protects an egg when it is dropped from a height of about 10 feet.

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

Show your child how to concoct a simple duo of household ingredients that changes color as acids and bases are added!

How do you tell time without a watch? Use the sun! This simple activity will show your child how to build his own sundial.

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

Show your child how to construct a homemade thermometer. It's hands-on fun and a great way to learn about this important instrument!

This science project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

Show your fifth grade scientist how to create a siphon using two buckets, plastic tubing, and water. Watch her astonishment as the water travels uphill!

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.

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

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!

Show your fourth grader how to see her heart in action. Make a simple device out of a drinking straw and clay to help her spot the movement of her pulse!

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.

There are many benefits to bugs and insects. This science project shows how cockroaches, termites, and other critters benefit our planet.

Your child helps the environment while saving your family money in this fun and rewarding "Gas Guzzlers" competition.

How do organic materials become soil? This science experiment measures what materials biodegrade.

This science project teaches students about organic farming and the benefits and disadvantages of commercial plant food.

This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched.

In this fun experiment, learn about brand awareness and the influence of media on children by testing logo recognition in different age groups.

This science fair project idea explores whether people have an innate feel for the passing of time from a few seconds to 20 minutes.

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

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

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

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

This science project allows students to study the psychology of happiness.

This science fair project idea investigates the difference in reaction times between boys and girls.