My Sims have their own museum The Black and White. It's all their paintings and sculptures they've created, lots of other cool things that are in the build mode, they have a space garden and regular garden, and in the basement is all the game collectibles they've gathered as well as all the artifacts from the jungles. My building is always crowded probably because I give NPCs things to do there like paint and whatever. There's even a huge garden in the back overwatched by Patchy. I also made it dog and cat friendly so there's always an assortment of furry friends visiting. The prebuilt museums were boring to my boys (and to me as well) but having my own is awesome.