3 years & up. These colorful blocks are soft, light, durable and non-toxic. The precise edges and firm shapes make them easy to build and stack. Encourage children to build with imagination and enhance their engineering skills. With 9 different shapes, you can build all types of unique and fun shapes. They are waterproof, float and stick together when wet. A perfect addition to block or water play. 68 pieces, 9 shapes.