Nightmare Before Christmas Backpack and Lunch Bag for Kids - Jack Skellington School Supplies Bundle with 16” Backpack, Insulated Lunch Box, Stickers, Water Bottle, More | NBC Backpack for School. This Nightmare Before Christmas school backpack features adjustable shoulder straps, zip closure, and a top loop, featuring Jack Skellington and measures approximately 16" x 12" x 5". This Nightmare Before Christmas backpack for kids has plenty of space for folders, notebooks, and books. The front accessory pocket is perfect for holding pencils, pens, school supplies, toys, snacks, and more. This durable Nightmare Before Christmas backpack for kids also comes with a Nightmare Before Christmas lunch bag, perfect for taking your food with you anywhere. Officially licensed Nightmare Before Christmas backpack bundle also includes a Beach Kids water bottle, stickers, and a bat door hanger. For ages 3 and up.