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.

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

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.

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.

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

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

In this project students experiment with making music using only glasses of water.

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

In this project children practice the scientific method while playing with puffy paint.

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.

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.

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.

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

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

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 examines whether adding gelatin causes a solid to have a higher melting point and/or melt slower.

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

Gather some friends for a bubbly soda taste test do determine calories' role in your favorite drinks.

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

Kids will learn some cool stuff about chemical reactions by determining what happens when you mix different concentrations of hydrogen peroxide and yeast.

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

The goal of this evaporation experiment is to learn about how different external conditions affect drying time.

There are many benefits to bugs and insects. This science project shows how cockroaches, termites, and other critters benefit our planet.

The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.

Test whether plants can grow without sunlight and water.

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.

Explore scientific concepts with this experiment that introduces kids to the scientific method!