Because I loved Santa as a kid and want that for jasper.
I wasn't really going to *do* Santa this year yet. Jasper is 3. But I'm amazed how much he seems to get Santa and love Santa books, Santa hats, obviously daycare has helped with this he's excited and bewildered by Santa in shopping Centres. So I did go out and buy $25 worth of cheapish toys 'from Santa' just to play this wonderful game of make believe with him.