The general concept of kendama is pulling the ken up and balancing the tama somewhere on the ken, or vice versa. There are not any specific rules on how to play kendama. However, bending the knees while playing kendama is a method that experts use. Endless tricks and trick combinations can be made with just ken grip, sara grip, tama grip, and candle grip by themselves or together in a combination.
A kendama is made up of the ken (stick) with a point at one end, three cups, and the tama (ball) with a small hole in one end. The cups on either side of the sarado (cross piece/cup body) are called the ozara (big cup) and kozara (small cup).