A portable and assembleable enclosure having a floor constructed of a first rigid panel and a second hingedly interconnecting panel, a recessed channel extending about an outer perimeter of the floor panels. A plurality of walls are each constructed of a rigid material and exhibit an annular shaped projection along a first extending side edge. A corresponding and annular shaped recess extends along a second extending side edge and receives, in engaging fashion, a first extending side edge of a succeeding wall and so that the walls may be interconnected along opposing extending edges in addition to being secured to the floor in upwardly extending fashion from within the recessed channel. A peaked roof is constructed of a first rigid panel and a second interconnecting rigid panel and which is secured to an upper perimeter extending edge of the interconnected walls. First and second pairs of triangular shaped and hinged end panels securing to opposite ends of the peaked roof panels and to enclose the structure. The floor, walls and roof convert between a stacked and transportable configuration to an assembled configuration without the need of tools.