i was stationed in Korea ... waaaaaaaaaaaaaaaaaaaaaay back "when". my son was also stationed there - much more recently. a good friend of mine is there right now.
have no fear, Mother Dear. he'll be just fine and will have a blast! :P
the flat rate terri mentions is the domestic rate. we don't pay international rates when we mail to military addresses. you should go to the post office, though, and stock up on the customs forms that still have to be stuck to the outside of the packages.