We participated in the Elf on the Shelf tradition this year, and Emme LOVED it. She named him Jingle. Incidentally, our elf was not mischievous like some household's elves are...but maybe he will be next year.
She would wake up each morning and run out to the family room to see where he was that day. She got SO excited about it. On his last day, Jingle brought with him a note. It thanked her for being so good this year and told her he had let Santa know. It also said she could take him down from the shelf for a few minutes to give him a kiss and a hug before he had to go back to the North Pole until next year.
Emme totally dug it. We can't wait for Jingle to come back next year!