Janice Vancleave's Physics for Every Kid: 101 Easy Experiments in Motion, Heat, Light, Machines, and Sound;

How do magnets work? What makes a curve ball curve? What keeps an airplane in the air? How can a pulley make you five times stronger? Now you can learn the answers to these and other questions about basic physics through 101 fun, safe, low-cost experiments and activities that can be performed at home or in the classroom. In Physics for Every Kid, you'll learn about gravity from funnels that seem to defy nature by rolling up hill. Using a balloon as a power source, you'll make a fluorescent light bulb glow and learn how electrons are used to produce light. And you'll levitate a Ping-Pong ball to understand aerodynamics. Each of the 101 experiments is broken down into its purpose, a list of materials, step-by-step instructions, expected results, and an easy to understand explanation. Every activity has been pretested and can be performed safely and inexpensively in the classroom or at home. Also available in this series from Janice VanCleave:
Astronomy for Every Kid
Biology for Every Kid
Chemistry for Every Kid
Dinosaurs for Every Kid
Earth Science for Every Kid
Geography for Every Kid
Geometry for Every Kid
The Human Body for Every Kid
Math for Every Kid