Kunstboer, an Amsterdam company designed this colorful and happy, practical backpacks.
SPECIFY YOUR STYLE IN COMMENTS BUT read pricing below. Styles change often. 
The bags have extra long shoulder straps with reinforcements at the attachment points. The backpacks have soft padded ergonomic shoulder straps are reinforced with nylon.
The Large Backpacks have an easy to clean reinforced plastic bottom plate, a large front pocket with zipper 25 x 23 x 5 cm, a wallet pocket with zipper on the inside, a drink cup holder with elastic inside. Bumpers (piping) all around on all bags and all bags are easy to clean. (Large Packs: Rocker Dino or Cat, Zig Zag Cat, Hawaii Cat, Ice cream  $48) (Large Packs: Metallic Cat Mermaid, Pink Glasses Cat $54)
Medim Backpacks and Shoulder Bags are 35 x 25 x 15 cm and they have a single compartment. (Medium Bags: Cat Party, Unicorn, Birds, Panda or Fox Astronauts, Train, Comics, Vehicles $39) (Medium Metallic Pack: Mercat $45)
Toiletry Bags are single compartment and have metallic fabric and one zipper and a carrying handle. $28.