Features Easy to play, just tilt or shake it to make the little iron balls roll inside the drum to produce melodious sound. The sound is like ocean waves crashing against rocks, very attractive to little children, they will enjoy listening to it. An excellent instrument early education, can develop children's listening ability and musical sense, perfect for boys and girls. The drum surfaces are painted with environmental and safe paint, doing no harm to children. Transparent color, beautiful appearance design, small size and light weight, a nice Christmas gift and birthday gift for children. Specifications Color: Transparent Material: Iron & wood Product Size: 15.5 * 15.5 * 3.8cm/ 6.1 * 6.1 * 1.4inch Product Weight: 111.8g/ 3.9oz Package Size: 16 * 16 * 5cm/ 6.2 * 6.2 * 1.9inch Package Weight: 115g/ 4.05oz Package List 1 * Wave Drum