What do you mean there is not Santa Claus? Thats news to me!! haha
seriously though...I have no idea how old I was when I realized it was my parents...I remember when I asked (Im thinking about 12 years old) my parents told me that the day I stopped believing then he'd stop coming and my present count would be WAY less hehehehe and that if I still believed then he'd come see me until I was married
and he did...The year I turned 22 was my first year without him
my daughter still has all the thank you letters that"Santa" wrote her thanking her for being such a good girl all year and for the the cookies and eggnog that she left out