Aki Inomata designed a series of 3D-printed homes for hermit crabs, modeled after skyscrapers in Tokyo and French apartments. They're the same size as the seashells that the crabs usually live in as they switch from shelter to shelter. The whole project's a commentary on how humans move and adapt. It turned out that the hermit crabs liked their new homes (given the choice between a seashell and the plastic architecture, one crab debated for a while and then chose the plastic. Inomata said she had mixed feelings about the fact that it didn't go for the natural option).