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

This science fair project focuses on a polymer called hydrogel super absorbent crystal which absorbs water, swelling to many times its original size.

Science fair project which determines whether the size or the thickness of a piece of paper has an effect on how many times it can be folded in half.

This science fair idea examines hydrogel superabsorbent polymer crystals. They can absorb 500 times their weight in water. Can they absorb other liquids too?

Is it amplitude? Weight? Length of string? Kids will discover what factors changing the period of a pendulum depends on in this fun and easy physics experiment.

Learn how to demagnetize a magnet and how physics can explain this phenomenon with this enlightening science fair project.

What keeps a an item cooler, polymer crystals or ice? Find out in this cool science experiment!

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.

What's the relationship between temperature, air humidity and static electricity? Kids will find out with this free static electricity science fair project.

This science fair project idea investigates if heat from direct sunlight is hotter than heat from reflected sunlight.

Discover how and which salt melts ice the quickest.

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 project explores the concept of being opaque or clear. Can you make something clear opaque? Or something opaque clear?

This science fair project idea investigates if webbed feet help a duck (and others) swim.

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

What chromosome combinations determine a fetus gender? Use probability to think about whether a sperm and ovum will create a male or female in this project.

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

This science fair project idea investigates how the height at which a pendulum is released affects the length of time it continues.

This science fair project idea determines if the temperature of rubber effects how high it bounces.

Does the temperature of a magnet affect its strength? Learn about the relationship between magnets and temperature with this cool physics science fair project.

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

Discover that the absorbency of fabrics depend largely on the shape and structure of the individual fibers that make up the fabric.

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

Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!

This science fair project idea explores substances that cause a bubble to last longer.

Learn how to make a ping pong ball anemometerâa device used to measure wind speedâin this free science fair project idea.

In this CD hovercraft science project, students will construct their own DIY hovercraft.