Electronickel by Fantasio - Trick

The magician borrows a nickel from a spectator, or uses one he may be carrying, shows a Led and says that he will turn on the Led using the new energy properties that coins have nowadays. He puts one of the wires of the Led against the coin and the Led turns yellow. Further more, the magician takes another led showing that touching Jefferson's ear the Led turns Green and touching the mouth, it turns Red. Everything is given to be examined.