I have an 8 year old girl, and she firmly believes in Santa Claus. She writes her letters early (postal code H0H 0H0), talks to the elf on the shelf, and gets up ridiculously early on Christmas day. I think its fantastic, kids grow up to fast these days, into an overly messed up world.
Quite surprised no one has mentioned "Yes Virginia, there is a Santa Claus"
http://www.nysun.com/editorials/yes-virginia/68502/
" Yes, Virginia, there is a Santa Claus. He exists as certainly as love and generosity and devotion exist, and you know that they abound and give to your life its highest beauty and joy. Alas! how dreary would be the world if there were no Santa Claus! It would be as dreary as if there were no Virginias. There would be no childlike faith then, no poetry, no romance to make tolerable this existence."