My son only saw the video once–for just about 15 minutes–like I said, one of his therapists brought it along during a visit. We tried the Calm portion first–as soon as he heard the music, his attention was captured. After only a minute or so, he started doing the moves. There were about 6 adults in the room–we were completely silent. Every few seconds he would look at me, so I started to do the moves and everyone else followed. It sounds crazy, but I could see his body relax–his breathing slow. After a little while, he sat down on the floor, continued to do the moves and by the time it ended he was lying down!