Build a Better Mousetrap : Make Classic Inventions, Discover Your Problem-Solving Genius, and Take the Inventor's Challenge, Paperback by Kassinger, Ruth, ISBN 0471395382, ISBN-13 9780471395386, Brand New, Free P&P in the UK Offers activities, challenges, and step-by-step instructions for making a variety of classic inventions, including a periscope, a stethoscope, a hovercraft, solar water heater, and mousetrap.
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