In this science fair experiment, children demonstrate the relationship between the amount of stuff and the amount of pressure in a closed system.

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

This is a quick, easy science fair project that conveys the idea of density to preschool and early elementary children.

In this air pressure science experiment with a balloon and a jar, children will use heat to create a partial vacuum and suck a balloon into a jar.

In this science fair project, kids start a chemical reaction that will make a balloon inflate itself!

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

In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

With this science fair idea, little scientists will gain valuable insights into the physics behind throwing a baseball.

Soil is made up of different layers. How far down do you need to dig to find the soil horizon, or the place where bits of leaves and branches become soil?

In this fun science fair project idea, kids will experiment with various methods in order to discover the fastest way to cool a soda.

How would you dry your wet clothes if your dryer didn't work? Find out with this fun experiment!

In this pinto bean germination experiment, you'll learn about how fertilizer aids in growing pinto beans into seedlings.

Observe corn seed germination to learn about dicots and monocots and how plants grow from seeds to seedlings to full-grown plants!

In this cool experiment, learn how to find specific gravity of minerals using liquids of different densities to see which substances and items sink and float.

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

What is persistence of vision? With this hands-on science fair project idea, students will demonstrate this cool and dramatic phenomenon in their own classroom.

In this fun project, use a memory game to test various age groups and determine whether aging directly affects short-term memory loss.

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!