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.

Test whether plants can grow without sunlight and water.

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.

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.

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

How does rust form? Kids will learn about the roles oxygen, water, and electrons play in rust chemistry in this cool science fair project idea.

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

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.

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 distance affect the spreading of light? Kids see diffraction and the inverse square law of light in action with this great science fair project idea.

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

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.

This science fair project explores how osmotic pressure forces water through the root up into the plant.

Observe corn seed germination to learn about dicots and monocots and how plants grow from seeds to seedlings to full-grown plants!

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

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.

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

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

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.

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

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.

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

In this science fair project, we'll use a liquid crystal thermometer to find out whether exercising makes a difference in people's temperature.

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 discover how sedimentary layers form as sediments like mud, silt and sand settle over time.

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

In this project, vinegar and salt act as preservatives keeping bacteria from growing in the bouillon mixtures.

Why does honey crystallize? This science fair project project answers this question and identifies the variable that makes this sweet solute crystallize faster.

Does skin thickness really decrease fruit spoilage? Find out in this science fair project idea!