A modular pet recreational assembly includes at least a frame, which may include a first frame having a first vertical wall and a second vertical wall opposite the first vertical wall. Multifunctional support dowels may connect first vertical wall to second vertical wall. One or more shelves may protrude beyond first vertical wall and second vertical wall. A sheet of flexible material may be incorporated, with a first end secured to the at least a frame and a second end secured to the at least a frame. The sheet of flexible material, shelf, and/or first or second vertical wall may have one or more openings sized to permit passage of a small animal such as a cat.
