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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!

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

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

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.

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.

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

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 purpose of this science fair project is to demonstrate how yeast, a fungus, causes bread to rise.

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.

Cleaning can be a chore, but not with this sudsy experiment!

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?

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

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

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

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.

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

Will increasing the amount of salt in water effect how slow or fast the water freezes?

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

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

The purpose of this science fair project is to explore whether UV light passes through some colors and not others by looking at blue, red, purple, and clear.

Learn how to make a food pyramid with animals in a a coniferous forest ecosystem around your home.

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

Science fair project that examines condensation and the conditions needed in order for dew to form.

Most people assume that cold water freezes more quickly, but could that be false? Does hot water freeze faster than cold water? Let's find out!

Stories change as you retell them. The objective of this science fair project is to demonstrate how information gets interpreted, distorted and changed.

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

Did you even wonder why some rocks are round and smooth while others are broken up into small pieces?

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

In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.