These specially designed sea shells have different tactile surfaces and come in 3 sizes. They are made from natural Fibre Particulate Composite (FPC), an agricultural waste product from rice stems and rice husks. Children will love to touch and feel these shells, describing the differences and similarities. Also ideal to teach early number concepts, such as sorting, matching, comparing, sequencing, patterning and counting. The set contains 36 tactile shells, 2 of each in 6 different tactile finishes and 3 sizes. Specification Sizes: 40mm, 47mm and 54mm. Age: Suitable from 18 months.