[mlok]

Funny, it reminds me of War Of The Buttons, a famous French movie from 1962, where kids would cut out buttons from their enemies as a war trophy, and stash them.

https://en.wikipedia.org/wiki/War_of_the_Buttons_(1962_film)

The buttons (at 2:25) : https://youtu.be/O5StEEzpT04?t=145