How to make switches that can be turned on and off without touching

This image never sends out or communicates with the universe, I am experimenting with a switch that can be turned on and off without touching it.

This is the finished product movie, it works properly. I do not react when I pass slowly and react only when my hands pass quickly.

YouTube - Fightswitch Demo
http://www.youtube.com/watch?v=lZ1nncjwq_s

See below for instructions.
Gogglemarks.net - Stir your tea with a wrench.

circuit diagram


It can be turned on and off without touching the hand, so it may be the first step to a device that can handle problems without problems even if you are eating snacks, but why he was so desperate as to make a switch so far I do not know whether it is. Also, it seems that this antenna models "basin" as a model.