Book is in French This is a set of customizable, constructible electronic gizmos with an entire book of games, pranks and jokes. Included are simple instructions to make a door alarm, motion sensor, light sensor, or push-button sound machine, and then program it with one of four funny sounds. 9-volt battery required. Not included. Includes circuit board (with speaker, LED, component wires, battery clip, photodetector, and switches), switch pin, alligator clip, gadget dock and case and 6 doublesided gadget covers. Author - Ben Grossblatt Number of Pages - 32 Format - Hard cover Publisher - Editions Scholastic Published - 2014-11-01