Fantastic Four Backpack Set - Bundle with 16" Fantastic 4 School Bag, Water Bottle, Stickers, & More | Marvel Superhero Backpack for Kids, Boys. This Fantastic Four school bag set includes a 16" blue backpack with adjustable straps, front pocket, and a red top loop. Backpack features artwork of Mister Fantastic, Sue Storm, Human Torch, and The Thing. This Fantastic Four backpack for kids is the perfect size to carry your notebooks, binders, pens, pencils, and any other superhero school supplies. Take this Fantastic Four bag with you wherever you go! Officially licensed Marvel Fantastic Four backpack set includes Marvel stickers, a Beach Kids water bottle and Beach Kids superhero door hanger, making it a perfect set for back to school! Caution: Entanglement Hazard. Keep away from very young children. Do not place around neck. WARNING: CHOKING HAZARD—Small parts. Not for children under 3 yrs.