Abstract: A toy construction kit includes a number of members assembled together with an edge-and-slot engagement. A support member includes a neck and a panel, and a rotary member includes an orifice for receiving the neck of the support member and for rotatably securing the rotary member onto the support member. The panel includes two portions foldable relative to each other for engaging into the orifice of the rotary member, and a latch for locking the portions together after the portions are engaged through the orifice of the rotary member.