Sidekicks Backpack Shark. Ensure your child makes a great first impression at school and give them loads of confidence with a Stephen Joseph Sidekick Backpack. Theyâll love having this fun and colorful buddy that all their friends will enjoy talking about and playing with. Thereâs plenty of room for all their books and lunch box, and even a front pocket that is the perfect size for pens and pencils. Plus, youâll know their little shoulders are comfortable with the cushioned and adjustable straps.