This is the practice that I was taught by Chen Naiming, head of the acupuncture department of the Shandong provincial hospital, when I studied acupuncture in China. This will build up your hand strength and sensitivity and pay big dividends in your clinical practice. Here’s the article on how to make the practice pad. The video for making the pad is in the article or you can watch it on the Ashi Acupuncture youtube channel.