Vintage Chinese Musical Stress Balls or Iron Balls, Boading Baoding Balls Enamel

Vintage pair of Chinese musical stress balls with a blue base colour with a Chinese Panda bear and bamboo enamelled on both. These make a musical sound when you roll them in your hands and are believed to reduce stress among other health benefits. They also look lovely. In original box. The box has some wear and fading. These are medium large size. They have some minor scratches from age and use.