Elf on the Shelf is a beloved Christmas tradition that has been around for over a decade. The tradition involves a special elf doll that is placed in a home during the holiday season. Each night, the elf moves around the house, keeping an eye
From Wikipedia
An elf is a type of humanoid supernatural being in Germanic folklore. Elves appear especially in North Germanic mythology, being mentioned in the Icelandic Poetic Edda and the Prose Edda.