From the manual for micro dwellings:

The MICRO DWELLINGS are modular, can be scaled up and down, and expand and grow together with other systems into small communities. The MICRO DWELLINGS can be built onto rooftops of existing buildings or be suspended from a bridge or a wall. The modules can be mounted on wheels to become mobile or be connected to form floating constructions. As is the case with the version shown in this manual, they can also be made as watertight, amphibian houses that can be completely submerged or partly elevated to the water surface.

Or you can paint numbers on their sides and use them for a really, really big game of Dungeons and Dragons.