I'm German and we take turns spending one Christmas in Germany with my folks, and the other with my in-laws in the UK. The first couple of years were easy as my oldest was a bit too young to grasp Christmas. Last year she had just turned 3 and we were at my in-laws, and the whole she-bang with whisky, carrots and fireplace footprints was had. This year we'll be in Germany were celebrations are done on Christmas Eve and presents are usually brought by the "Christkind".
There are no other really young children in the family, so it's really only my kids who need to be fooled
So how do we do it best? We'd still like to do stockings and things, too.
a) tell them that father christmas really is a franchise and needs help from the Christkind to get it all done, and she starts early, being German and efficient.
b) only do family presents on Christmas Eve, and have Father Christmas bring his presents and the stockings over night as usual (would also help against the unwrap and discard frenzy a little)
c) just go 'bah humbug' and not do the silly charade at all?