In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

This project explores what happens to a rubber band when it is heated and cooled.

This science fair project idea investigates how color affects temperature.

Make stunning pendulum waves and learn the math behind the patterns generated with this cool and easy science project.

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 explores whether musicians are better than non-musicians at distinguishing and understanding speech in noisy environments

Get a cool science project idea on a photovoltaic cell and explore the various factors that affect the energy output of the photovoltaic cell.

This experiment strives to determine if tracking of conservation habits will lead to reductions in a family's electricity and water bills.

Determine how good we are at direct and indirect observation.

Sink or swim? Calculate the density of various fruits and vegetables using water and a kitchen scale.

In this science experiment, do tensile strength test on fishing line, a strand of hair, a rubber band, and any other materials you're curious about!

Does nail polish really slow the growth of nails? Explore in this science fair project idea.

Science fair project which helps you determine your latitude by using an astrolabe, which measures the angle between the North Star and the horizon.

Learn about magnifying glasses, concave lenses and inverted images by sending rays of light through a magnifying glass in this cool science fair project!

Science fair project which measures the shadow cast by a meter stick at various times in order to predict the circumference of the earth.

This project uses toy cars to determine how friction and gravity affect cars and braking.

Discover whether ants are more attracted to natural cane sugar or artificial sweeteners.

Use applied math to model orbital eccentricity in this cool science fair project for 7th grade.

This science fair project idea investigates how optical distances change the apparent size of an object as seen through a magnifying lens.

This science fair project idea determines exactly how much of an effect road grade has upon a cyclistâs speed.

How can Hooke's law explain how springs work? Learn about how Hooke's law is at work when you exert force on a spring in this cool science project.

Using a toy race car kids create a visual model of the Doppler Effect.

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

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

Do your laundry and your science project simultaneously! This science fair project investigates whether the color of a garment affects the time needed to dry.

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.

What can you do with hair after its cut? This science project teaches you practical uses for human hair.

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.

Score a bull's eye with this cool science fair project on horizontal projectile motion. Guide a marble to its target and predict its trajectory using math!

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