B. Primary Subjective Motor Outcome: Canadian Occupational Performance Measure (COPM). Individualized, family-centered tool identifying child and family-perceived difficulties in self-care, productivity (school), and activities. Such subjective measures are essential in hemiparetic CP trials. Validated for these ages and such trials, the COPM was a robust measure in previous perinatal stroke trials. The investigators have recently characterized how COPM goals are set in this population and their relationship to success (Haspels et al, unpublished).