Elf on the Shelf is a popular Christmas tradition where a small, mischievous elf figurine is placed on a shelf or in a prominent spot, watching over children and reporting back to Santa if they have been good or bad. This mischievous elf is known for playing pranks and tricks on children, creating magical experiences and adventures that keep the magic of Christmas alive. The elf itself typically has a friendly and mischievous look, with pointy ears, rosy cheeks, and a mischievous grin.