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.

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.

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!

In this exciting and empowering challenge, your child will construct a bridge using marshmallows and toothpicks!

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

In this fun design challenge, your child will get creative with making structures out of toothpicks and gumdrop candies.

In this activity, your child will transform an egg into a glowing, bouncy "ball" that they can play with.

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

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

In this activity, your child will be asked to create a boat that can successfully float while holding 25 pennies.

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 activity, your child will be challenged to use simple materials to create a catapult for a small, lightweight toy.

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.

This science fair project idea examines which type of insulation holds in the most heat.

In this fun activity, your child will create their very own solar oven to bake s'mores!

This experiment challenges students to forecast the weather based on the surrounding areas' weather.

When you cut a flower to put into a vase, it'll eventually wilt, even with water and sunshine. But is there another scientific secret to keeping flowers fresh?

What animals are most popular? This project affords practice in data-collection, record-keeping and data-analysis through the investigation of this question.