FES will be delivered while participants engage in task-oriented activities that require reaching and grasping. Neuromuscular recover in stroke patients typically starts with recovery of proximal parts and then recovery of distal parts. Therefore, the research team will test tolerability proximally to distally in the protocol. The participant will be asked to perform three to five of the following movements: 1) touch nose, 2) touch opposite shoulder, 3) touch forehead, 4) move arm forward, 5) lift affected arm up and extend elbow, 6) hand opening, 7) palmar grasp, 8) pinch grasp, 9) lateral pinch grasp, and 10) lumbrical grasp. In long-term therapeutic FES interventions, once participants are able to voluntarily control these shoulder and elbow movements, the OT would proceed to focus on the distal parts of the arm. However, because this is a tolerability study and FES will only be administered in one session, the OTs will test the distal parts of the arm even if the participant has not achieved voluntary control of their shoulder and elbow movements. The participants will be asked to perform each specific task for an interval of 10 to 20 seconds. Participants will repeat each task 10 or more times, or as long as the one hour session allows. This session will involve the parent and a child life specialist to increase the child's acceptance during the therapy and to assist in the process of detecting and mitigating discomfort during sessions. Observations will be recorded by the OT as in Part 1. During and after the session, the OT will look for signs and symptoms of discomfort.