In the 1984 movie "Gremlins," Inventor Rand Peltzer sets out to find an unusual Christmas gift for his son Billy. He ends up purchasing a furry little creature called a "Mogwai" from the grandson of a mysteries shopkeeper. Little does Peltzer know, he's bringing home a bundle of chaos. Billy names his Mogwai "Gizmo," and sets about getting acquainted with his new pet. Unfortunately, Billy and his family fail to follow a set of care and feeding rules offered by the shopkeeper's grandson, and the result is that the cute furry Mogwais multiply into a horde of ill tempered green lizard men. So, according to the shopkeeper's son, what are the three rules that you must follow in order to prevent your Mogwai from mutating into a mob of Gremlins?

Bonus Question: Who is credited as providing the voice for little Gizmo?