TOlerability of Transcranial Direct Current Stimulation in Pediatric Stroke Survivors

Inclusion Criteria: * Childhood stroke survivor - either arterial ischemic stroke or intracerebral hemorrhage. * Stroke must be childhood onset, defined as occurring day 29 of life to 18 years of age (per the American Heart Association's definition of childhood stroke) * 3 months or greater from stroke onset * Arm impairment, defined as pediatric stroke outcome measure of 1 or greater of affected arm. * Affected arm Fugl-Meyer score of 60 or lower. * Able to participate in occupational therapy sessions. Exclusion Criteria: * Uncontrolled epilepsy, defined as seizure within the past 6 months. * Craniectomy without replacement of bone flap. Patients who underwent craniectomy will need the bone flap reattached prior to participation. * Presence of cranial metal implants or implant device that could be affected by tDCS: cochlear implant, implanted brain stimulator, or programmable ventriculoperitoneal shunt.