Baoding Balls

I found these at Goodwill and I loved the chiming sound they made, so I bought them, took them home and did some research. I found out that they are called Baoding balls, and they have been around as long as the Ming dynasty. They are used for meditation - They're good for working on your hand dexterity, and with enough practice, one can go from two knocking into each other as they rotate to swirling four in your palm at once without them touching.

"Chinese practitioners claim that muscles remain nimble, bones are strengthened and the mind kept sober through prolonged usage of the health balls. Other benefits are blood circulates more freely, and different chronic diseases such as hypertension are kept from developing. In time (in terms of many years of practicing Baoding balls use) the brain becomes healthier and you will notice that your intelligence and memory improves. Furthermore, fatigue goes away, your worries disappear, stress is reduced, and in the end your life is extended."