Presents an introduction to electricity, discussing the principles of currents, conduction, circuits, and voltage, along with instructions for simple experiments that demonstrate these principles.

Why are cows given magnets to swallow? How does a compass work? Where can you see the aurora borealis? The 'Do It Yourself' series offers an exciting new approach to understanding and investigation. Each book helps you to conduct your own experiments and activities, and to learn more about the world around us.