Wooden Geometry Puzzle Set – Tryangle Triangle Matching Game for Kids, STEM Shape Pattern Blocks with Cards, Ages 4+This sturdy wooden box holds 6 large wooden triangles and 18 smaller wooden triangles of 6 colors for individual or group play. The large triangles can be put together to create a mosaic of colors. Use the 12 pattern cards to follow the pattern or create your own pattern with the small triangles. A great hands on tool for manipulating and learning about angles, geometry, and cooperative play.