Sonic Mini Backpack for Kids - Bundle with 11” Video Game Mini Backpack Plus Stickers, Water Bottle, More | Sonic Preschool Bag for Boys, Girls, Kids. This Sonic the Hedgehog preschool backpack features adjustable shoulder straps, a zip closure compartment, and a top loop for hanging featuring colorful artwork of Sonic, Shadow, and Knuckles. This Sonic backpack for kids has plenty of space for your little one to take small items to preschool. The Sonic backpack measures approximately 12" x 8" x 4". This durable Sonic backpack for boys and girls also comes with Rex-Man stickers, a Beach Kids water bottle, and a Rex-Man door hanger! Officially licensed Sonic the Hedgehog mini backpack set for kids. Pair this with other Sonic the Hedgehog school supplies. Caution: Entanglement Hazard. Keep away from very young children. Do not place around neck. WARNING: CHOKING HAZARD—Small parts. Not for children under 36 months.