Teach your child how to make an all-natural, yellow-brown dye, using just walnut shells and water. This deep dye can be used on textiles, art, and wood.

What's the difference between a microwave and an oven? Use mashed potatoes to explore which kitchen appliance does a better job at keeping food warm.

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

Future engineers, unite! Discover how to keep a sandcastleâs bridge from falling into the moat.

What are buttress roots? In this fun science project, make a model of a rainforest tree and learn how they help trees survive in the tropical rainforest!

Science fair project that examines how winter storms form and the relationship between temperature, moisture and snow.

Discover how to make fake snot with this cool science fair project idea to learn about polymers, enzymes, and more.

Test out the pH levels of soil in your backyard versus soil in more wild environments to solve this science case.

In this hands-on design challenge your child will make their very own Rube Goldberg Machine.

Have your child build his own mini waterfall, and help him develop his planning, problem solving, and architectural skills.

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

Do different types of oil mix or stack? Find out in this science fair project idea!

Science fair project that determines whether lettuce that is harvested gradually yields more produce than lettuce that is harvested all at once.

The purpose of this science fair project is to demonstrate how yeast, a fungus, causes bread to rise.

Explore the chemistry of latex polymers with this outrageous, hilarious science activity.

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.

In this science and engineering activity, children will explore types of tunnels and their purposes and then design and build a tunnel of their own.

Explore how dielectric heating comes into play when microwaving various liquids in this science project. This test will help you understand how microwaves work!

Check out this cool science project idea to learn about rocks and explore the cycles of formation, breakdown, and reformation of rocks in the Earth's crust.

In this experiment, young ecologists will learn about a type of edge effect: how trees and plants at the edge of a forest can act as a weed filter.

How would you dry your wet clothes if your dryer didn't work? Find out with this fun experiment!

It's not actually that hard to get energy from garbage! Kids learn how to make biogas in the form of methane with this cool and easy science fair project idea.

Get this cool science fair idea to explore how arctic tundra animals change their behavior and adapt to survive in long, cold winters.

Demonstrate how static electricity can cause an object to move. It also examines just how an object affected by static electricity will move.

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

Take a look at forensic science with your child. She'll learn how to take a shoe impression, just like the detectives do!

This science fair project idea discovers whether there are some objects that do not fall at a constant rate.

Believe it or not, images that are cast upon your eye's light-sensitive screen (called the retina) are upside down. Here's a fun, fast experiment to prove it!

This science fair project idea compares biodiversity between drops of water.