Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

This light bulb science project includes step-by-step instructions for testing the heat from different light bulbs.

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.

In this cool science experiment, learn about magnetism and poles, and test magnet strength to find out if two magnets are twice as strong as one.

Step into the fantastic world of colors with a project that explores what shade you -- and your friends -- like best.

This project compares the strength of one, two, and three-ply toilet paper.

Milk is made of water and fat; but how can you separate the two? Find out in this color changing milk experiment.

This science fair project compares the allelopathic affects of juglone, a chemical agent produced by the Black Walnut tree, on two plants.

In this science fair project, young children discover what happens when two fluids that have different densities get together.

In this experiment, your child will create two compost bins and see if he can determine what attracts fruit flies.

This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

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

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

Science fair project which determines whether it is numerically possible to be connected to every person on the earth within six degrees of separation.

Science fair project that examines how to grow bacteria in a controlled setting, using simple materials from around the home.

Science fair project in which you will examine how crystals are formed by creating your own crystal using charcoal briquettes, salt, and ammonia.

Demonstrate how to tell the age of an egg without having to crack it open.

This science fair project idea builds models of various types of bridges and then determines which bridge design is the strongest.

Science fair project that helps you better understand density by comparing the relative densities of cans of Coke and Diet Coke.

Science fair project which uses coins flips to visually demonstrate the probability of an event and how to express it.

In this science fair project, students will create a model of a shoreline, observe erosion and examine how jetties prevent erosion.

Check out this science project idea to compare organic produce to non-organic produce and how preservatives in food extend the shelf life of goods.

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.

Science fair project that examines the behavior of water and gravel in creek beds and the formation of sedimentary rocks.

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

This science fair project idea explores how length affects the weight a bridge can hold.

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

Science fair project that teaches you about chemical indicators and how to make your own in order to identify various mystery solutions.

This science fair project idea investigates how a bottom keel helps keep a boat from rocking back and forth.