@aeva this reminds me distinctly of a game/toy thing I played with on a website. I can't remember what it or its genre was called, but it's procedurally generated this giant tree of objects that I think you could then sort-of interact with. Like, on a planet there's a continent with a country with a state with a city with a neighborhood with a building with a room with a couch in it that would also generate spiders because that's what couches do