This is the 4 elements drum it's made of rawhide, buckeye, walnut, cherry, cedar, and pine, with a total of 69 pieces of wood. The "stones" at the bottom represent earth. The unusual wood grain of the buckeye shell looks like fire, so it represents that element. The drum itself is a water drum (the level of water put inside changes the tone of the drum), so this represents water. Since this is a drum, it can't function or be heard without the presence of the air element.