Shiny metal balls. They make different sounds when rolled. About 5cm in diameter. I didn't know how to use them, so I looked on YouTube. Apparently, you put them in your palm and shake them to make sounds. Mysterious. Does it soothe you? Maybe use them for body massage with sound? Mysterious. But I'm putting them up for sale. If anyone wants to buy these mysterious balls, please do. Thank you for looking.