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

Plants and light seem to be good buddies, but how far does the friendship really go?

The goal of this science fair project is to attempt to build a perpetual motion machine and analyze the Laws of Thermodynamics.

Science fair project that determines which materials cause the most friction by sliding blocks of wood down a ramp.

Kids get step-by-step instructions for how to make a rubber band car and explore the physics of potential energy with this fun engineering science fair project.

Discover whether cheap saline solution bottle cleans and disinfects just as well as more expensive kinds formulated with different ingredients.

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.

Determine the maximum distance traveled by projectiles launched at an angle. Use some cool math to figure out at which angle your projectile will go farthest.

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

A project to reinforce learning about the layers of the rainforest, rain forest ecosystem, and the greenhouse effect.

Learn the anatomical and physiological differences between central and peripheral visual systems.

Find the North Star, and measure your latitude! The purpose of this science fair project is to find latitude and learn about geographic locations.

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

What is the hydrologic cycle and how does it work? Check out this fun and easy science project where you will model and learn about Earth's water cycle!

Science fair project that determines whether brain size is correlated with intelligence.

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

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

Stories change as you retell them. The objective of this science fair project is to demonstrate how information gets interpreted, distorted and changed.

Is it a square or a circle? See if you can trick your friends with this zany science project!

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

How does water pressure change with depth? Kids learn how pressure works underwater with this cool and easy demo.

Kids will love making clouds and learning how to make a water cycle model in this fun science fair project idea that explores evaporation and precipitation.

Why does purple cheese look nasty? Because color plays a big part in how we perceive the taste of different foods. Are birds just like us in this respect?

Calculate the mass of the Earth using the sidereal and calendar period of the Moon and Newton's Law of Universal Gravitation in this physics science project!

This science fair project idea examines the reason boats are shaped and engineered.

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.

The goal of this science fair project is to assess the acidity levels of common food and household products using pH test strips.

Learn how to use the Punnett Square to predict the gene combinations of dominant and recessive traits in this fun and easy genetics science project!

Examine the influence of the phase of the moon on moisture capillarity in garden soil. Measure and record the depth at which water is first detected.

Check out this fun science fair project idea for middle school students to learn about the effects of temperature on the density of a gas such as air.