What led to the invention of the amazing silicon chip? Did you know that the first TV was made from a hat box and knitting needles held together with string? Can a machine think? What’s special about fiber optics? Why are lasers so useful? Find the answers to all these questions, and more, in this title of the Crafty Inventions series, then go on to make a jet-propelled bottle plane, a string-and-pot phone, a flickerscope and a junk robot.