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

In this project, waves of vibrations are experimented with using water in glasses.

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.

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

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

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

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

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.

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.

Do you love to make Jell-O? Find out in this science fair project idea if it is possible to make Jell-O with just warm water.

The project determines which type of birds prefer which type of birdseed.

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

In this outdoor science activity you'll find tips on how to create a nature journal by choosing a native plant or animal and tracking that species.

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

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

This science fair project examines how seeds hitchhike on animals and clothing.

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 explores substances that cause a bubble to last longer.

Young scientists will investigate people's preferences for saltiness, and make some inferences about genetics and diet.

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

What's the best way to make DIY compost? Kids will learn about aerobic and anaerobic decomposition while learning to appreciate the value of composting.

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

Test whether plants can grow without sunlight and water.

This science fair project idea investigates how color affects temperature.

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