More than 30 hands-on projects for ages 7 and up that teach history, science and art by the author of the popular activity books Robotics and Geek Mom. Easy to follow step-by-step photos show you how to make realistic-looking crafts, suitable for gifts or school presentations. Includes interesting background information, along with related activities and print and Internet resources. Kids and adults can learn how to add on an abacus, design a Medieval gargoyle, compare different solar cookers, and find out why boomerangs fly and try an Early American paper craft. Crafts include a working electrical telegraph, African and Scandinavian baskets, flipbook animation, prehistoric cave drawings, and Mexican-style yarn paintings. Great for home, school, scouts, 4-H -- and anyone who loves making crafts