This book/kit is a wonderful way to relax your body, breath and mind. Using the balls you learn to place them under your calves (etc..) and release the muscles, joint and free up tension stored within. You begin to realize how much tension we carry in our bodies and get rid of it with the ball workout. After hours of sitting and not stretching or exercising, I found that just 10 minutes on these balls, created intense release and freedom in my entire body. This is a wonderful introduction to using small balls to stretch and relax and exercise. Yamuna Bodyrolling is another great system. Both work extremely well together. However, for the small price, this kit (balls and book) is a winning gift to yourself and your loved ones. They can only thank you for it!