That's cute!
Here in Canada, there's a special address for Santa Claus, and he has his own postal code for the North Pole (X0X 0X0). Children write letters to Santa, and Canada Post has people who write letters back! When I was little I would love getting a letter back from Santa! They're not just a generic letter either, they would include my name and even mention items on my Christmas list!
http://www.canadapost.ca/dec/santa/w...ta/santa-e.asp