I have written a book to that.....for 5 -7 year olds - that it is the elves and they collect all the Xmas trees left out to recycle them and use the pine needles to make a special soup for Mr and Mrs Santa.
all the kids leave him out pies, isnt that present enough? think the elves get him something and go to elfbay to get ideas ;) put some cookies out for him to take home to mrs Claus