BIG BOOK OF GIZMOS & GADGETS: Expert Advice and 15 All-Time Favorite Projects and Patterns

Inside you'll find ingenious plans for making 15 wildly inspired mechanical marvels from wood. Step by step projects are arranged by skill level from beginner to advanced, with full-sized patterns attached in a handy pouch. Designs include: Mad Scientist Franekswitch, Two-Track Marbel Racer, and more. Color photos.