At their schools, the tradition of self expression (as well as signaling their membership in different groups) is alive and well with backpacks. These keychains get clipped to book bags and will often equal the volume of scholarly materials.
No one has reached the levels of the Japanese kids in the top photo, but plenty of bags look like the bottom bag.
This has carried over to quivers.
The younger one’s quiver includes declarations, awards, and totems.