Children with injury to one side of the brain (stroke, cerebral palsy, or traumatic brain injury) often have difficulty with many life activities due to problems with their ability to pay attention and also problems with keeping their balance. This project will help explain how a child's problems with paying attention impacts their ability to keep themselves safe while standing and moving during childhood life activities. This study will have children participate in a several different assessments to evaluate how they are paying attention, how well they keep their balance, how well they are able to move and play, and will ask parents to complete a couple of surveys to provide information about what the children are like at home. This study will consist of one visit to MUSC campus that will take about 2 hours to complete the testing.