Amazon.com description: Product Description: Making a piece of wood move is fun, but making it tell time is truly amazing! Inside this book youll find ingenious plans for creating awesome wooden machines that actually move and keep time. These working wooden wonders might just be the most enjoyable projects you ever build in your shop. Wooden gear clocks are not only fascinating to watch, but can be surprisingly accurate timepieces. Just dont expect atomic precisionafter all, theyre modeled on 17th-century technology! But as you build these clocks youll use all of the basic principles that still govern mechanical clocks today. Seven well-illustrated step-by-step projects are arranged by skill level from beginner to advanced, and full-sized patterns are attached to the book in a handy pouch. With a little perseverance youll soon be ticking along happily with your own wooden clockworks. All you have to do is build them, wind them up, and let them runno batteries required.