Not a cat, I know but I think all us kitty lovers would love one of these for our furry friends - DIY Kitty TARDIS Playhouse For Cats
Cat tree - for real. This would look great in the house, much more decorative than the carpet towers sold at the pet centers, and the kitties seem to be enjoying it! Craft store tree, handyman platforms, totally do-able.
Jeff Zeff, Products I Love Board "A couch for people and cats!"