Elf on the Shelf -- Dark Skinned Elf is based on a tradition Carol Aebersold began with her family in the 1970s. This cleverly rhymed children's book explains that Santa knows who is naughty and/or nice because he sends a scout elf to every home. During the holiday season, the Elf on the shelf watches children by day and reports to Santa each night. When children awake, the Elf on the shelf has returned from the North Pole and can be found hiding in a different location. This activity allows The Elf on the Shelf to become a delightful hide-and-seek game. Each collection comes with its very own scout elf, a hardbound children's book, and a keepsake box for easy storage. In addition, each shipment is marked for “Special Delivery” from Santa's workshop.