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

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!

In this cool science experiment, learn about magnetism and poles, and test magnet strength to find out if two magnets are twice as strong as one.

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

In this science fair project, young children discover what happens when two fluids that have different densities get together.

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

In this experiment, your child will create two compost bins and see if he can determine what attracts fruit flies.

Milk is made of water and fat; but how can you separate the two? Find out in this color changing milk experiment.

This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

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.

Here's a great activity that uses corks and toothpicks to create a fleet of floating boats. Which design makes for the most seaworthy vessel?

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

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.

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

In this project, build an insect model that shows how the head, thorax, and abdomen fit together! Learn insect anatomy by constructing a paper mache critter.

This science experiment tests why guacamole goes brown and if leaving the pit in will stop guacamole from turning brown.

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

When you cut a flower to put into a vase, it'll eventually wilt, even with water and sunshine. But is there another scientific secret to keeping flowers fresh?

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

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

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

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

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.