Every banknote has a story!
When I was on Holiday when I was 7 (or maybe 8) years old. I got a 50 Francs note from my parents, this to buy what I wanted.
I liked this note so much that I did not spend it, this note was the first of my collection. We are now 30+ years further and the collection is still amazing. Of almost every note I know how I got it, if it was from myself or one of the friends that gave them to me.