The symptoms and disabilities associated with cerebral palsy vary from one individual to another and depend on the severity of the initial brain injury or abnormality. According to the Centers for Disease Control and Prevention, between 50 and 60 percent of children with cerebral palsy can walk independently. Approximately ten percent need a handheld device for mobility, such as a walker. About 30 percent of children with cerebral palsy cannot walk or can walk only with severe limitations.