BUILD YOUR OWN GOTCHA GADGETS

Science meets immaturity in this top-selling title with a set of customizable electronic gizmos, along with a book of games, pranks, and jokes. Klutz-clear explanations of the electronic circuitry accompany step-by-step instructions for how to wire (and rewire) your own door alarm, motion sensor, light sensor, and push-button device. It's like a science fair project with the soul of a whoopee cushion. 9-volt battery not included.
Comes with:
A 32-page book of science and sneakiness
1 electronics module with speaker
LED
Photo detector
Contact switches
1 alligator clip
1 gadget dock
4 double-sided gadget covers