Marvel Super Hero Adventures Mini Backpack ~ 3 Pc Bundle With 11" Avengers Superhero School Bag For Boys, Kids, Spiderman Coloring Pack And More | Marvel School Supplies. This Marvel Super Hero Adventures mini backpack measures approximately 11" tall and comes with adjustable braided shoulder straps, top loop for hanging, and exciting Avengers superhero cover art. Perfect in a Marvel Super Hero Adventures school supplies set, the Avengers mini backpack is great for toddlers and small children just getting back-to-school. This Marvel school bag can also double as a Super Hero Adventures travel bag, room decor, or toy organizer. Marvel Avengers design features your favorite characters such as Hulk, Spiderman, Captain America, and more. Officially licensed Marvel Super Hero Adventures school backpack. The Avengers mini backpack also comes with a bonus Rex-Man door hanger and Spiderman play pack containing coloring pages, stickers, and utensils.