What about fireflies? They’re very tame. Stick out your hand near one and there’s a good chance it’ll land on you and just stay there for a while.
Interesting idea—I dunno—I’ve never lived in an area where they come into homes. Where do you live?
Into homes? Oh, it didn’t occur to me that you were restricting to that context. I may have seen them indoors but certainly neither often or in numbers.
Edit: That said, it shouldn’t be hard to bring a few indoors if you really want to do so. :P