Abstract: A toy that can be stored as a sofa having a bench, a backrest and a headrest and that can be taken apart to build structures large enough for a child to crawl through or play in. The toy is a construction set with a plurality of first, second and third pieces. The first pieces form the bench, the second pieces form the backrest and the third pieces form the headrest. The pieces are solids with planar faces and are rearrangable into a play house having sidewalls, gables and a roof wherein the first pieces form the sidewalls, the second pieces form the roof and the third pieces for-the gables. Pairs of fasteners of opposite gender are arranged on the faces of the first, second and third pieces for joining the pieces into the sofa, the play house and other structures. Even numbers of pairs of fasteners of opposite polarity are provided for joining the pieces in more than one orientation.