What causes the seasons to change? Kids find out by modeling the earth's tilt using a globe, flashlight and graph paper in this cool science fair project idea.

How greasy are your potato chips? Students will use a reliable method to quantify greasiness and compare different brands in this great science fair project.

What causes sound? Here's a simple science experiment that adds a visual element to the science of sound to help kids better understand this tricky concept.

In this science fair project, learn how to make gears and find out why they transmit torques in predictable ways.

Learn about this simple machine and make a pulley of your own to use for fun science trials.

Inspire your child to put on her engineer hat for the day, as she builds her very own, double-decker bridge.

Learning about how plants grow is a building block in the early grades science curriculum. Put a fun twist on this life science concept with these cup monster friends!

Teach your child some scientific basics as you explore the densities of various liquids in this fun experiment.

Show your child how to construct a homemade thermometer. It's hands-on fun and a great way to learn about this important instrument!

Find out which type of sponge holds the most water.

It's easy to plant your own in-home container garden! This planter contains pizza-themed herbs and is a perfect early gardening activity for kindergarteners.

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

Science fair project which teaches you about the principles of physics within a vacuum by creating a vacuum chamber.

What's the quickest way to separate salt and pepper? Let static electricity do the work! Your child will be fascinated by this simple experiment.

In this science project, learn about water transport in plants and make a beautiful dyed floral arrangement with cohesion, adhesion, and xylem tubes!

What are the effects of colored light on plant growth? Explore plant behavior in this cool botany science fair project and learn about phototropism!

Do you think you can blow down a sand castle with a mighty wind? Find out which material stands up best to erosion in this erosion experiment.

In this CD hovercraft science project, students will construct their own DIY hovercraft.

The objective of this science project was to build a model of a volcano and observe reaction between different substances, including baking soda and vinegar.

Here's a science experiment that gives your kids a chance to see how fire needs oxygen to burn, with a little math and writing practice thrown in.

Your child will do a fun science experiment using soap and pepper flakes to help understand the concepts of water molecules and the surface tension of water.

Start your toy engines -- this is going to be a fast and friction-filled race!

This science fair project idea investigates emulsifiers that allow oil and vinegar to mix.

In this activity, your kid has your permission to get his socks nice and filthy. In fact, it's a necessity, because those socks are going to make a garden.

Throughout history, people have used song as a teaching and memory tool. This project explores whether song improves a person's ability to retain information.

Put your second grade scientist to work this Fourth of July with our colorful "liquid fireworks" project!

Discover whether cold or hot water from the faucet will boil faster on the stove.

Check out this cool science fair project idea to explore which other common animals besides scorpions glow under a UV Black light.

This project examines if computer screen and text color affect retention and if people subconsciously prefer combinations of colors that help their retention.

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