This guide focuses on four physical science topics that fascinate children and scientists alike. They are motion, magnets, sound, and light. With your guidance and support, these topics provide children with many opportunities to explore...

How far would you have to travel so that the light of the full sun would provide "daylight" no brighter than twilight on Earth? This project describes a method to verify the inverse square law: how light, sound, electrical signals, and...

Strike a key on the piano, and you hear the string vibrating. Just about any object vibrates when it's knocked, but how much and how fast? This project helps you find out. You'll build a simple light-sensing circuit for measuring the...

If you're lucky enough to live in a place that gets snow in winter, you know that the feel of the snow can vary a lot. Sometimes it can be light and fluffy, and other times heavy and wet. This project shows you how to use data from daily...

With the help of some economics metaphors, Habitat Network delves into the scary-sounding "ecological trap" and helps bring it to light.