Kids learn how to manipulate additive and subtractive colors to send secret messages with red colored filters in this cool science fair project idea.

The objective this science fair project is to determine whether a bigger bag will allow a homemade hot air balloon to fly higher than smaller bag.

In this activity, your child will be asked to create a boat that can successfully float while holding 25 pennies.

In this project, the affect of acid rain is simulated by the acid, vinegar.

Science fair project that determines whether lettuce that is harvested gradually yields more produce than lettuce that is harvested all at once.

How good are humans at sound localization? Kids can try this cool science fair project idea to see how good their friends are at judging sound direction.

Help your first grade scientist learn about metamorphosis by observing the life cycle of some interesting creepy crawlies.

Do you think you can blow down a sand castle with a mighty wind? Find out which material stands up best to erosion in this erosion experiment.

This biodiversity project examines the biodiversity in your own backyard.

Start your toy engines -- this is going to be a fast and friction-filled race!

This science fair project idea explores whether it is easier to balance on a narrow ledge or on a rope.

What is mulch? Kids will provide soil with a wet blanket of mulch and see if that helps keep drought-stricken soil damp.

Children will learn why and how to compost as they help with the process of filling their compost, turning it, and observing the changes that occur.

This science fair project idea demonstrates how air resistance contributes to denser objects falling faster than less dense objects.

Determine if gender affects the ability to identify different smells.

Examine the effect of pressure on carbonation in soda.

This science fair project idea explores the egg's thin membrane.

This science experiment has students test whether a snail moves faster on concrete or dirt.

This project tests the hypothesis that dark colors absorb more heat than light colors.

In this science fair project, we'll use a liquid crystal thermometer to find out whether exercising makes a difference in people's temperature.

Help your kindergarten science maven explore the water cycle without getting everything wet.

Science fair project which compares the rate of temperature change and the maximum temperature as a result of the angle of light radiation.

This science fair project idea produces varying pitches of sound.

Explore the scientific concept of capacity by seeing how many pennies you boat can hold before it sinks!

Conduct a simple experiment with your child to study how dirt tracks change as they age in this 1st grade science activity.

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

Combine the science of physics with the fun of playing spy. Your young detective can make his own tiny looking glass. It's simple to make!

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

Here's a science experiment that gives your kids a chance to see how fire needs oxygen to burn, with a little math and writing practice thrown in.

Help your curious third grader construct a dazzling spinning wheel that will teach him about the science behind colors while providing some silly entertainment!