Even though it was cold out, the cold bothered Jonny less than the tactile stimulation of a blanket.\n In a single session, an OTs goals are more limited, but over time, OT makes a perceptible change in function. A complete description of OT/SI is beyond the scope of this article In brief, in the hands of a gifted therapist with advanced training, play is used to entice the child to engage in challenging activities that are specifically designed to regulate the 'child's arousal to sensation, to increase the child's motor skills, and to provide a platform for social participation, self-regulation and self-esteem outside the therapy session.