Chinese Green Yin Yang Exercise balls

Chinese Exercise balls are also called Thai Ji Balls, Healthy Ball or Therapy Balls. They are dated back to Ming Dynasty. They comes from the ideal of traditional Chinese medicine. Through fingers moving, the function of brain and internal organs can be strengthened, so as to help blood circulation and to remove fatigue. Putting two balls in one hand and rotating can relax mind and hand. It is good for releasing pressure. There are Yin Yang on each of the balls. Two balls can produce nice sound and they are included in one box. The Exercise balls are made out of metal.