CarePlay Grid Blocks are colorful and easy to put together, making them a fun addition to your preschool classroom. The molded plastic blocks are waterproof and a cinch to wipe clean. Recommended for ages 18 months to 5 years. Choose a set of 16, 32 or 48 blocks in a variety of colors. The16-piece set includes four triangles, six squares and six squares with holes. Square blocks are 12" wide by 12" high.