Inspite of its coarse appearance this tremendous huge thing is very touch- and shock-sensitive.
With rising intensity of the stimulus the thing reacts with a wild popping of flashbulbs and steadily increasing provocation.
Roof laths (used)
10 small speakers (industrial remainders)
10 powerful light emitting diods (of a damaged car stoplight)
10 soundchips (of a run out promotion of a tobacco producing enterprise)