An ion!
About two weeks.
One turned into a terrifying monster, the other is an avenger.
Because they don't have seals on the South Pole Takes a while to get, but it's worth it in the end.
The seals says, "Anything but a Canadian Club."
One of them has shiny bodyhair and smells like cod, the other one is a mammal that lives in the sea.
By pumping ion!