I'm doing a Secret Santa on my club board (I wasn't around very much for the sign up here, and missed it.  Boo.) and my person is in Canada.  
I looked on the USPS website and found the prices and estimated shipping times, but is there anything else I need to know?  Any extra fees or rules on what I can or can't ship?  I was thinking about sending some candy-type things, and I'd hate for Canadian mail to think I was trying to blow them up with chocolate buckeyes. 
Thanks!