Find Out About Machines: With 19 Projects and More Than 260 Pictures

Discover what machines are, how they work, and how they have developed through history, in this fascinating fact file and learn-it-yourself project book.You can find out about levers, pulleys, wheels and axles, gears, hydraulics, wind power and much more.It includes 19 practical experiments - make a windmill, a hydraulic lifter and even a vacuum cleaner!Over 260 images include step-by-step photographs and explanatory illustrations.It is an accessible and lively introduction to machines, ideal for home or school use for 8- to 12-year-olds.From sophisticated computers to a simple pair of scissors, we are surrounded by machines.This engaging science book looks at the enormous variety of machines in our world and how they function.Fascinating hands-on projects, such as making your own gears and belt drives, a pulley, a block and tackle, a can crusher, a water wheel, and an Archimedean screw, will help you to fully understand the principles behind them. "Find Out About" is a series for youn