I remember living in Wood Green, a vaguely rough area of London, where people put the sofas they no longer wanted out in the front garden in case someone else did.

Anyway, we were getting rid of an Ikea box-case-thing, and stuck it outside, and a kid of say 11 asked if he could have it, and took it off on a toy truck.

He came back and pushed a card through the door saying thank you (it would be "just right to keep all my toys in"). I am pretty sure his mum made him write it, (long story) but we kept that card in the back of various drawers through maybe two house moves because it was an unexpected example of politeness and parental guidance.

One of the crazy things that social media might sort out one day is that i would strongly consider recommending that kid for a job, or university, simply on the strength of that one act. No idea who or where he is of course but there we go.