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.

Use reusable, recyclable materials--along with a dose of imagination--to build a castle with first grade geometrical forms.

The purpose of this science fair project is to build a basic radio.

Sink or swim? Calculate the density of various fruits and vegetables using water and a kitchen scale.

What's the difference between centripetal and centrifugal force? Students find out by seeing both in action as they conduct this experiment.