Sorry for the title, but I just don't know what else to call this assemblage of objects. Tasked with designing the interior of a small apartment, Russian architecture firm Ruetemple came up with this "mobile solution for recreational areas." Ruetemple's website is so sparse that the principals' last names are not even give—all we know is the firm consists of "Alexander" and "Daria"—and the project pages offer little in the way of description, so we'll have to let the photos do the talking here.
What they came up with is three separate, wheeled components that can be assembled in a seemingly infinite variety of ways:
Interestingly enough, from what I've been able to puzzle together from a Google translation of this Russian-language blog, it appears that the space is not a proper apartment (it apparently lacks a kitchen, for instance), but was designed as a sort of standalone duplex romper room for two children.