555 Radio component, when touched creats sign waves, based on the resistance you put across to the terminals, so who ever touches becomes a human resistor and creates the circuit. "to much talk about how these days it is not good to touch in certin ways and we wanna tell people that touching is a relly important part of evey day life, human to human contact or skin to skin contact could be a switch to evry day electronic gizzmo" Beau and jay silver ....ok 2 touch....