Empty guest bedroom

My guest bedroom has been empty for awhile, but I never really noticed because repairs had been going on to fix the upstairs patio (from underneath, through the guest bedroom ceiling).

Anyway, it's now completely empty... not a single piece of furniture.

I'm thinking ball pit. But I think jwz looked into this and found it prohibitively expensive. (but I think that was for the entirety of the DNA Lounge, a bit more square footage...)