Learn how to demagnetize a magnet and how physics can explain this phenomenon with this enlightening science fair project.

In this science fair project, kids measure how weather conditions affect how fast a puddle evaporates.

Kids often ask, "how tall am I?" This science fair project seeks to determine how well kids can guess their own heights.

How does frost form? How fast does it form? Do this simple science project using a plastic glass, rock salt and some water to learn about deposition.

This science fair project idea measures out the sugar of various foods and find out whether people can correctly determine how much sugar is in common foods.

This science fair project examines how seeds hitchhike on animals and clothing.

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

Ever wondered how a plant drinks water? This science project will teach you how and help you create a beautiful floral display!

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

How does smell affect taste? Ready your taste buds--in this project, you'll gather some test subjects and do a taste test to see how much smell affects taste.

In this science fair project, students discover how sedimentary layers form as sediments like mud, silt and sand settle over time.

Learn how to tell time by the sun with this cool science fair project idea that tracks how the accuracy of a sundial changes over time.

How does a flashlight work? Kids will make a complete circuit and explore how voltage contributes to brightness with this science fair project idea.

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

Demonstrate how you can make your own compass using a magnetized needle. It also allows you to compare magnetic north and geographic north.

Have you ever wondered how many numbers most people can memorize? Test your friends to find out!

In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.

Kids will learn how to make a thermometer to to explore liquid density in this great science fair project. Which liquids are affected by temperature the most?

How do icicles form and what do they look like? Do this free science fair project and watch the formation of icicles occur right before your eyes.

How do animals keep warm? In this experiment, find out whether fat insulation resists cold temperatures and learn how this works in the animal kingdom.

How does a compass work? What's a magnetic field? Kids will build their own compass at home to find the answers in this great science fair project idea.

Kids will learn how to clean fish tank the natural way. Add catfish to the tank and see if your water gets cleaner.

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

In this science fair project, students learn how pressure can make the minerals in a rock line up in the same direction and form bands and foliation.

This study evaluates if electronic devices commonly found in most households emit radiation, and if they do, how much?

Dinosaurs were huge creatures that left behind huge footprints that lasted for millions of years. In this science fair project, kids learn how dinosaur tracks were left behind!

Slime: It's oozy, it's goopy, and it's just plain fun! Learn how to make slime with this fun science fair project.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

This classic children's game demonstrates how sound travels through air vs. through a solid.

Explore how sound waves are reflected and absorbed by producing echoes. Analyze which locations produce echoes.