Pumpkin 2012?

One happy Hallowe'en surprise presented itself when I was cutting into and cleaning our Jack-o-lanterns-to-be! Sprouted seeds! Deep within the dark cozy "womb" of one of our pumpkins, several seeds had grown roots and were sprouting!

How magical! We planted these sweetlings and one survived the shock, and here he is, being unimpressed today with another shock: snow!!!

So, what am I going to do with this baby? Can I keep him alive all winter, until I can plant him outside? How do you slow down a pumpkin's growth?