Years of testing with children has produced this carefully crafted set of doable projects. With the step-by-step instructions and highly visual 3D illustrations that successfully guide you through each of the inventions, central scientific concepts are presented so that you'll understand the "why" as well as the "how" of the workings of the following objects that you will build:- a spinning motor- a clicking telegraph- a light flashing generator- a real radioThe use of everyday materials demystifies the way common electronic components work; the following common household items were not practical to include in the kit, but will be needed: toilet paper tube, paper towel or shipping tube, piece of cardboard or shoe box lid, white glue, tape, scissors, piece of paper and aluminum foil.For ages 8 and up.Contains over 30 pieces and a 40 page full color illustrated book. Requires 1 D battery (not included).Contents include: Germanium Diode, Earphone, Motor, Light Bulb and Holder, Heavy Duty Ceramic Magnet, Magnet Wire, Construction Bases, Connecting Wire, Battery Bands, Telegraph Switch, Connecting Fasteners, Plastic Storage Box, Wooden Dowel, Jumbo Sized Paper Clips, Packing Foam, Sandpaper, Paper Fasteners, Nail, String, Cardboard, 40 Page Full Color Illustrated Book. Requires 1 D battery (not included).For 1 playerAges 8 and upMade in ChinaBrand new condition in original packagingWipe clean with dry or damp clothWarning: Choking Hazard - Contains small parts not suitable for children under 3 years.