A foldable play structure is disclosed which includes a first wall unit, a second wall unit, and a first axially latchable hinge. The first hinge includes a first leaf attached to the first wall unit, a second leaf attached to the second wall unit, and a first pintle extending through the first and second leaves along a first axis. The first and second leaves are slidable relative to each other along the first axis between a pivotable position, wherein the first and second leaves may pivot relative to each other about the first axis, and a latched position, wherein pivotal movement of the first and second leaves about the first axis is restrained.