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.

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 starch and carbohydrates interact with different solvents in this fun and easy packing peanut science fair project.

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

This science fair project idea measures the growth of bread dough and finds out how long it takes for the dough to stop rising.

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.

Find out whether soil amendments can improve soil conditions and help you grow a bigger beanstalk in this ecology experiment!

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.

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!

Free science fair project idea that measures change in flexibility with age, using a variety of flexibility tests like Sit & Reach.

Demonstrate how static electricity can cause an object to move. It also examines just how an object affected by static electricity will move.

This experiment will explore the possibility of creating an infinite object by hand.

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

Check out this fun science project idea to explore different types of starches and learn how removing starch affects the quality and taste of food.

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

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

Cookie catastrophe! In this project you will determine if different types of cookie sheets can cause cookies to bake differently.

Here is a kindergarten activity that blends art and science by using magnets, paint, and objects found around the house to create a picture.

Your preschooler can learn how to siphon water with just two bottles and a plastic tube in this fun, educational science activity.

This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.

This project examines the phenomenon of using a mirror to trick a person's brain into experiencing sensations in body parts not actually affected.

Tin can phones offer something modern versions don't—a fun project to make with a friend, and a dramatic illustration of vibration and sound waves.

Create uphill flow of water by using a siphon. Create vacuum by suctioning one end of tube, and submerge it under water. Watch the direction the water travels.