How does Santa really know who"s been naughty or who"s been nice. After much urging by the elves and Mrs.Claus, Santa has allowed his biggest secret to be revealed in the book, The Elf on the Shelf: A Christmas Tradition. Santa has partnered each book with a magical scout elf which children name. They can then visit the North Pole (elfontheshelf website) to register their elf"s name in our Hall of Registry and print their official elf adoption certificate. All Santa approved, of course. Gift set includes: A North Pole scout elf, a hard-bound children`s book and a keepsake box.