I decided to buy the "Elf on the Shelf" book for Sean this year in hopes of curbing his tantrums, etc. Well, it has worked to some degree, but he has already figured out that Santa will be giving him some presents.
I read him the story and he named the elf, Henry. We also have 2 hermit crabs named Henry. One evening, I fussed at him for getting into our closet (something he knows not to do) and I sent him into the den. I heard him telling Henry to tell Santa that he was being good :).