Magnets are everywhere - find out all about the natural force of magnetism, what it is and how it works, Learn how magnetism was discovered, the magnetic poles, how a compass works, how to test magnetic fields, and how magnets are used in everything from toys and games to cars and computers, 15 fantastic hands-on projects will help you to find out for yourself: make an electromagnet, a light switch, a magnetic fishing game, and your own loop compass, Over 200 pictures include step-by-step photographs and explanatory illustrations, Ideal for home or school use for 8- to 12-year-olds Book jacket.