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!

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.

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

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

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

How does dishwashing liquid work? Kids discover the chemical mechanism behind cleansing power in this easy science fair project idea.

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

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

Help your second grader observe the phases of the moon, and then let the fun loose: he'll get to chart his observations with marshmallows!

In this sound experiment children listen for differences as they tap on a bag of air, a bag of water, and a wooden block held up to their ears.

How do organic materials become soil? This science experiment measures what materials biodegrade.

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

This science fair project idea investigates how magnetism can defy the force of gravity.

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

The goal of this evaporation experiment is to learn about how different external conditions affect drying time.

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

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 idea demonstrates how air resistance contributes to denser objects falling faster than less dense objects.

This science fair project idea investigates how optical distances change the apparent size of an object as seen through a magnifying lens.

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

This recipe makes bubbles that not only blow up nice and big, but do tricks and experiments! How do you do it? It's not a secret, it's science!

In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

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

There are many benefits to bugs and insects. This science project shows how cockroaches, termites, and other critters benefit our planet.

This science project lets students explore the number of spots on a ladybird and how to treat ladybugs with respect.

How can we describe the relationship of magnetic field strength vs. distance? Kids will find out with this free science fair project idea.