Sonic the Hedgehog Backpack Set - Bundle 16" Sonic Backpack Featuring Amy, Tails, Knuckles, Plus Stickers, More | Sonic and Friends Backpack for Boys, Girls, Kids. This Sonic school bag bundle includes one 16" backpack with adjustable shoulder straps, front pocket space, and top loop for hanging. Backpack features colorful artwork of favorite Sonic characters Sonic, Tails, Knuckles, Amy, and more. Show off your love of Sonic in style! This backpack is sure to be a hit with videogame fans of all ages and pairs perfectly with all other Sonic the Hedgehog merchandise. This Sonic backpack is perfect to take to school and can also double as a travel bag to take everything you need with you anywhere you go! Officially licensed Sonic the Hedgehog backpack set for kids ages 3 and up, boys and girls alike. This set also includes a Beach Kids water bottle, temporary tattoos, and Rex-Man door hanger.