The Elf on the Shelf is a Christmas tradition that involves placing an elf doll in a different location in your home each night leading up to Christmas Day. The idea is that the elf is watching and reporting back to Santa Claus about the behavior of the children in the home. To call your Elf on the Shelf, you can simply say, "Elf on the Shelf, I need to talk to you." The elf will then come down from its hiding place and listen to what you have to say.