These specially designed sea shells have 6 different tactile surfaces and come in 3 sizes, and are made of natural FPC eco-friendly material. Children will love to touch and feel these shells. Also ideal to teach early number concepts, such as sorting, matching, comparing, sequencing, patterning, and counting. Set includes 6 different tactile shells in 3 sizes, 2 of each. Set includes: 36 shells and 1 cotton bag.