Its hip to be square, or triangular, or rectangular, or one of the 15 shapes in our Hip Shape Wood Sorter. Different shaped wooden blocks fit into the matching shaped openings on the house. After each shape is deposited, simply open the front door, empty the house, and start all over again. Wooden carry handles makes it easy for travel or play dates. Helps develop motor skills, color and shape recognition, and cause and effect. Made wil water-based, non-toxic paints and natural materials.