In this project, you'll build a model of the earth, complete with all seven continents and four major oceans.

This science fair project looks one of the most important factors affecting seed germination: water. A fun and easy plant biology experiment for 3rd graders.

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

This project compares the strength of one, two, and three-ply toilet paper.

Find out whether a longer airplane will fly farther or a wider paper airplane.

What is a compound microscope? Kids find out by making one of their own in this cool science fair project.

Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

This project explores whether plants can live and grow when "watered" with juice, soda, or milk.

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

This science fair project idea explores whether talking to a plant will help it grow.

Science fair project which determines if plants really do need water to grow, or whether they just need to be kept wet.

This science fair project idea explores whether the process used to dry the beans we eat for food renders them unviable.

This science fair project idea investigates the ability of different whitening toothpastes to whiten teeth.

This science fair project idea determines if the size of the parachute will change the rate at which an object falls.

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

This science fair project idea investigates the difference in reaction times between boys and girls.

Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!

This science fair project idea investigates if fats add to the flavor of food.

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

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

Science fair project which determines whether the size or the thickness of a piece of paper has an effect on how many times it can be folded in half.

Explore if planting seeds in a certain direction will affect how fast it germinates.

Do you think heat can affect a plant's growth rate?

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

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

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.

This science fair project idea explores substances that cause a bubble to last longer.

Which music genres have the fastest tempos? The slowest? This experiment determines if there's a relationship between beats per minute in a song and its genre.