For ages 8 to 8040 page full-color book and materialsAuthor: Penny Norman, Ph.D.Editor: Ann EinsteinYears of testing with children has produced this carefully crafted set of doable projects.Build, Build, Build. - a spinning motor - a clicking telegraph - a light flashing generator - a real radioStep-by-step, highly visual instructions* lead a child successfully through each invention. Incredible illustrations present central scientific concepts, allowing children to discover the " why" as well as the " how" .The use of everyday materials demystifies the way common electronic components work.