High quality of PVC, non-toxic, non-deforming, compact size, lightweight, durable. This product is a cartoon crab diving glasses mask for kids which is flexible and safe to play. Smooth surface and edges have no harm on children’s hands and finger, safe to play with. Cute cartoon crab can attract children and make them have more energy to play. Parents playing with kids together can increase parent-children interaction. It can exercise children’s hand-eye coordination, creativity and imagination. Improve children’s cognitive ability. It can also exercise children’s grabbing ability, and the flexibility of their fingers. Age:3-8