Providing an introduction to science, this series presents concepts gradually and simply, and backs them up with experiments and activities that are designed to be both straightforward and enjoyable. The illustrated step-by-step projects are accompanied by colour photographs of real places and objects. This book focuses on electricity and magnets at work, in the home and in the everyday world. It explains how to connect simple circuits with batteries, bulbs and wires, and how to make a switch, and the projects include building an electric crane and making a burglar alarm.