Part of our Doc Tesla™ Action Science Kits lineup.
This crazy gimmick is the best joke of the day. Battery operated circuit is hidden in the targets bedroom. As soon as the lights go out it emits a burst of high pitch sonic energy every 10 or 30 seconds or so. When the target turns on the light the circuit deactivates making it impossible to locate.
|This is a kit with plans and all parts included, requiring assembly.
It is also available as plans (paper or downloadable versions), with parts and assembly required.
To build this kit, you should be familiar with reading electronic schematics, and know how to solder and do basic mechanical assembly.