Make a periscope with milk cartons and mirrors! This preschool activity is great for playing secret agent and learning simple physics.

Will your liquid weigh less once you remove the fat from it? Find out in this science fair project idea.

This interactive project invites science fair-goers to participate in examination and recording to demonstrate the importance of firsthand observation.

Do lefties just write different or are their brains different? This science project has students explore what it means to be left handed.

In this activity, your child will be challenged to build a tall tower out of building bricks! The instructions include questions prompts to guide students through the design challenge.

Science fair project that examines search engine optimization, internet search trends using a statistical study of searched keywords.

This science project examines the history of earthquakes and what we can do to prevent future disasters.

This science fair project idea explores whether dry ice will cool a beverage faster than wet ice.

Science fair project that determines whether spreading a moss soup over an area increases moss growth.

This science fair project idea explores alcoholic fermentation at work by making your own soda.

Learn how to make a periscope with this cool engineering science fair project idea, and learn about optics to learn how a periscope works.

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

This science fair project idea focuses on the use a conductivity device to determine the ionic concentrations of hard water.

Determine the maximum distance traveled by projectiles launched at an angle. Use some cool math to figure out at which angle your projectile will go farthest.

The purpose of this science project is to determine which stimulus, gravity or water, will cause the greatest growth response in a plant.

The goal of this science fair project is to demonstrate magnetic forces of attraction and repulsion using a magnet and everyday objects.

Construct and experiment with a periscope using reflected light rays to gather an image.

A great science fair project on solar oven design that helps kids learn about solar power and solar heating.

In this science fair experiment, high school students fit the growth pattern of bacteria to a mathematical model and predict future colony expansion.

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

This science fair project idea examines whether the colors of the spectrum respond differently in the thermal aspect when radiated by the sun.

This experiment strives to determine if tracking of conservation habits will lead to reductions in a family's electricity and water bills.

Check out this cool science fair project idea to explore the relationship between pulse rate and blood pressure in healthy people.

Science fair project that examines how cell membranes allow the inward and outward flow of materials as demonstrated by eggs.

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

In this cool experiment, learn how to find specific gravity of minerals using liquids of different densities to see which substances and items sink and float.

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

Learn how to be a bird scientist in this simple project of watching feathered friends in their habitat.

Science fair project that helps visualize how the human brain functions by constructing a model of a brain.

This science fair project demonstrates the magic of arches by challenging students to stack telephone books on top of eggs without breaking them.