[CMB]

A large sand/digging area. Tubes and hides. You could add another shelf/platform.

As my Russian dwarf liked to go up the ramp along the shelf and then jump off the other end. I brought a long narrower bendy bridge/ladder and used it as another ramp. It goes at the other end of the shelf so there is two ways to get onto and off the shelf.. it also allows him to sit at one of the small doors. I use that door to let him come out and go back in. He uses it as a treat begging area.