Who was Archimedes and did his discoveries match up to his boasting? Did Leonardo s designs actually work? What sparked Edison s invention of the light bulb, and did Bell s early telephone ring? Tough challenges lead to another ten mind-boggling inventions in this title of the Crafty Inventions series. Find out why Marconi tied aerials to balloons and kites, how the Wright Brothers hobby of bird-watching helped them to perfect airplane control and why Trevithick nicknamed his steam locomotives OEpuffer whims. Then model your own inventions from a cocktail stick bi-plane and a corkscrew helicopter to a radar helmet and a big mouth megaphone