The Elf on the Shelf tradition began in 2005 when a toy and book set were created by Carol Aebersold and her daughters, Chanda Bell and Christa Pitts. The Elf on the Shelf is an elf figurine that is placed in a home during the holiday season, and children are told that the elf is Santa's helper who reports to Santa every night about their behavior. The tradition has become popular, and families now use the elf to create fun and magical experiences during the holiday season.