It started simply enough: a resident put out a take-a-trinket, leave-a-trinket box, the sort of low-stakes exchange that happens on blocks everywhere and usually peters out within a week when the trinkets run out or the weather turns. This one didn't peter out. The Castro, being the Castro, found it and kept adding to it.

What's in the box on any given day has become its own small archive of what people feel like giving away. Figurines, puzzle pieces, notes addressed to no one in particular, objects that clearly meant something to someone once and might again. A few people have started leaving notes alongside the trinkets — not explanations exactly, but something like them. The box has a growing reputation as a place where you can leave something and not know where it ends up, which turns out to be a feeling some people are looking for.

The resident who started it hasn't made the box into a project or a brand, which is probably why it's working. It's still just a box. It sits at roughly knee height, slightly weathered, with no sign explaining the rules because the rules are self-evident once you see it.

Anyone walking past tomorrow will see whatever's in there now — a different assortment than yesterday, almost certainly, and different again by the weekend. The box itself doesn't change. Everything inside it does.