Important moments in the history of technology are brought to life as students construct functional models based on the designs of James Watt, Samuel Morse, Michael Faraday, and other famous inventors. This comprehensive set contains 270 components for building the following 12 models: Safety Elevator, Electric Motor, Generator, Helicopter, Synchronous Wiper, Counter-Rotating Wiper, Parallelogram Wiper, Centrifugal Governor, Morse Telegraph, Cardan Shaft, Perpetuum Mobile, and Hair Hygrometer. Includes a 42-page full color instruction book for building all of the above models, and a multi-language, black and white activity guide with suggested task and experiments as well as information on the inventors behind these ground breaking innovations. Recommended for students age 9 and above. Requires 9V battery, not included.