missing the point
Actually, you guys are missing the point, this is actually pretty interesting, if you think, there isnt any actual invention that can turn itself completely off ready to be powered on without an external intervention, here is the description of the box that ben posted (the grand illusion one):
"I believe I am right in saying this machine was actually always "on", with an electromagnet holding the spring-loaded piston (with a doll's hand on) in place until the switch was operated; the hand then shot out, turned the switch "off", re-energised the solenoid, and retracted. "
Its exatly the inverse mechanism, which means that by mixing the two techniquies with some adaptations, we can actually create perpetual motion by constantly switching between on and off states...
Paris Hilton, because genius iam not