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

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.

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

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.

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

What animals are most popular? This project affords practice in data-collection, record-keeping and data-analysis through the investigation of this question.

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

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

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

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

In this experiment we will be determining whether birds prefer certain colors of seed.

This project determines what category of person is most likely to be ticklish.

Marshmallows are made of sugar, water, and air pockets. Since the marshmallow is flexible, will air pressure cause it to expand when heated in a microwave?

This science experiment has students test whether a snail moves faster on concrete or dirt.

This science fair project will help students learn about non-vascular plants, such as mosses.

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

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

This project examines whether people's taste perception is influenced by what they see.

This science fair project idea investigates emulsifiers that allow oil and vinegar to mix.

This science fair project idea investigates how the shape of an object affects drag.

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

In this experiment you explore how tectonic plates move to create land and expand bodies of water.

This science fair project idea examines whether plants are still able to grow normally if they are turned upside-down.

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.

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

This science fair project idea explores if the length of the string that an object is suspended on has an effect on how fast or slow it swings.

This science fair project idea examines which type of insulation holds in the most heat.