100 Make-it-yourself Science Fair Projects - Tapa blanda

"This extensive collection of do-it-yourself projects ranges from simple ideas using household materials to sophisticated plans requiring a significant investment of time and money, a few of which, such as a parabolic sound antenna, are unique. Each device or set-up includes a list of materials, generally clear instructions, and a black-and-white drawing of the finished product."-- "Booklist. "100 science fair projects that your child can do....Great for the new school season!"-- "Woman's Way . ."..many good projects...place in the school science library."-- "Appraisal . 224 pages, 102 b/w illus., 7 x 10.