Though designed for children, these are authentic instruments made from natural wood and cowhide. While they cannot be tuned, they produce a resonant sound that is enjoyable even for adults. The key to producing a good sound is to avoid covering the holes on the bottom. Being made of cowhide, the drumheads are unlikely to tear even when struck with a drumstick. The uneven color of the drum surface is due to the natural materials and is not a defect. Box included. ■Product Name: Baby Bongos ■Brand: Nakano / Japan ■Contents: 1 x Body ■Materials: Body (Rubberwood) Head (Genuine Leather) ■Size: Drum Diameter Large (120mm) Small (96mm) ■Country of Origin: India ■Safety Standards: CE Mark Certified ■Category: Wooden Toys / Children's Instruments