How does Santa know who's been naughty and who's been nice? The Elf on the Shelf(R), of course! This super cozy set includes the beloved holiday book and tradition with soft sleepwear and a boy elf for your child's shelf. Set includes choice of pajamas or nightgown and Elf on the Shelf(R) boy gift box set. Choose from light skinned or dark skinned elf. Nightgown Available in sizes 2T, 3T, 4, 6 and 8. Made of plush polyester flannel. Button-front closure. Detailed with a ruffled hem. Personalization is available for an additional $7.00. Machine wash. Imported. Pajamas Available in sizes 2T, 3T, 4, 6 and 8. Pure cotton ribbed knit. Matching pants feature a covered-elastic waistband. Set includes a top and pants. Personalization is available for an additional $7.00. Machine wash. Imported.