Canadian Santa Claus

Hi everyone,
I'm Laura from Italy.
Any people from Canada? I've read that you can send letters to a Canadian Santa Claus and he'll answer to you. I was wondering if any of you know how fast the service is when he has to answer to mail coming from other countries (Italy, in my case). I'd like to have my kids at school send letters to him, so I was wondering if it's ok to send the letters in a couple of weeks or so, or if I should hurry.
Thanks!
Laura