A couple nights ago, Bill called me in to look at something Ian was doing. Bill would touch part of Ian's hand or wrist and tell him to grab his hand. Ian would move his hand to try to grab and pinch Bill's hand between his own fingers. When Ian succeeded or got close, Bill would move his hand to a different place touching Ian's hand as he moved it. They played that game of pinch tag for a while. Something's going on inside Ian.