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Science fair project that examines what causes thunder and why a thunderclap sounds so loud. How is lightening related to the creation of sound waves?

The objective of this science fair project is to examine the effects of temperature on salt and water solutions, as they form crystals over time.

How do animals keep warm? In this experiment, find out whether fat insulation resists cold temperatures and learn how this works in the animal kingdom.

In this fun science experiment, kids will determine the best method for ripening avocados and discover the cool chemical reaction that makes this possible.

Take a closer look at your furry friend (or the furry friend of a neighbor -- with permission) to discover if communication exists between cats and humans.

In this project, build an insect model that shows how the head, thorax, and abdomen fit together! Learn insect anatomy by constructing a paper mache critter.

Did you know a mouse eats almost fifty times as much as a cow? Find out how and test out the strange science with your friends!

This science project teaches young students about germs, bacteria, and the importance of washing their hands. Students will test what is the best way to wash.

In this science fair project, kids observe the expansion of liquids when frozen and determine if some liquids expand more than others in the freezing process.

Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.

In this free science fair project idea, we learn about surface tension and how it can support mass—in this case, a floating paper clip.

Kids will learn how to show the direction of magnetic field lines and create a permanent model using iron filings in this great science fair project idea.

When you cut a flower to put into a vase, it'll eventually wilt, even with water and sunshine. But is there another scientific secret to keeping flowers fresh?

In this sound experiment children listen for differences as they tap on a bag of air, a bag of water, and a wooden block held up to their ears.

Science fair project that demonstrates the effect of detergent pollution on fresh water birds' ability to stay afloat.

In this project children practice the scientific method while playing with puffy paint.

How does dishwashing liquid work? Kids discover the chemical mechanism behind cleansing power in this easy science fair project idea.

This science fair project idea investigates how the shape of an object affects drag.

Do plants get crowded? Have your curious kid investigate how plants respond if they're forced to grow together in a confined space.

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 science fair project teaches about mold. Students will test different foods to see which grow mold the fastest.

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

This science fair project idea investigates if fats add to the flavor of food.

This science project challenges students to study deer behavior in their natural habitat- the feeding patterns, social behaviors, male to female ratio, etc.

In this science fair project, students use the streak test to tell minerals apart from each other.

When you rub a balloon on your head, your hair stands up; but is that true for everyone? Does hair color affect static electricity?

This science fair project idea determines which method of hand cleansing is the most effective.

The goal of this evaporation experiment is to learn about how different external conditions affect drying time.

What is a wedge? Kids find out by experimenting with different wedges in this simple science fair project idea.

Science fair project that determines whether cooling eggs helps them be peeled more easily. Compare the time it took to peel each egg.