Space-saving foldable notebook box for the school backpack: School notebooks have to endure quite a lot in everyday school life. They are packed into the bag multiple times a day, sometimes gently and sometimes not, may bend in an almost empty backpack, and might encounter a forgotten banana or a spilled bottle. Often, they look quite worn shortly after the school year begins. You can equip your child's school backpack with the notebook box, ensuring that the expensive, once carefully covered notebooks remain usable for longer. This way, school notebooks, as well as binders, writing pads, and softcover books in A4 format, have their own secure place. The organization can even be divided into several colored compartments, making it immediately clear where to look for a specific notebook. An extra compartment for a ruler keeps the 30 cm ruler safe from breaking. Keeping the backpack organized has never been easier! The attachment of the notebook collector is done via clips on the book compartment of coocazoo backpacks. A new compartment can thus be added in no time, which can be expanded or contracted depending on the contents, similar to an accordion. Unlike traditional notebook boxes and closed folder systems that have a fixed size, the foldable notebook box from coocazoo is space-saving.