This 10", non-tunable Ocean Drum from Mano Percussion creates the sound of a swirling sea and crashing waves, and features clear plastic heads on a wooden rim. By holding the frame with the skins laying flat, and then rotating your wrists to gently tilt the drum in a circular motion, the beads inside the drum roll over the bottom skin to create the sounds of a rolling ocean. Rotating at different speeds will result in unique sounds and textures, and starting and stopping abruptly creates a sound like crashing waves. This is the perfect instrument for educational applications, as well as children and beginner musicians, giving them the ability to create uniquely immersive and inspiring sounds!