Clamp plastic connectors to cardboard, foam core, or thin plywood panels to erect three-dimensional shapes like playhouses, mazes, bridges, and more. Budding builders learn planning and design skills as they map out their creations before beginning to construct them. They also advance spatial relationship skills and experiment with geometrical shapes to build the strongest structures. Fixed clips can be connected at eight angles, and green clips rotate freely for use as doors or windows. Includes 50 pieces, carrying container, and an instruction booklet. Recommended for Lower Elementary and up.