A construction kit for constructing a play structure. The play structure for providing children a place to play includes: a square-shaped, planar horizontal support member; plurality of legs; an octagonal-shaped, concave floor member; an octagonal-shaped, planar floor member; a plurality of vertical support members; a substantially convex ceiling member; two staircases; and a flag pole, removably coupleable to a top side of the ceiling member, and configured to hang a flag thereon.