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...

All waves will reflect and refract in the right circumstances. The reflection and refraction of light explain how people see images, color and even optical illusions. This tutorial discusses each concept and presents an experiment to try...

Here is an introduction to the concept of waves and wavelike motion people experience anywhere and everywhere.

An interactive resource on diffraction, interference and superposition with descriptions, animations, and questions.