Cerebral palsy (CP) is the most common physical disability in Canadian children. The comprehensive care of ambulatory children with CP functioning at Gross Motor Function Classification System (GMFCS) level I and II was covered in a previous practice point. This companion document focuses on the care of children with CP functioning at GMFCS levels III to V. Children functioning at GMFCS level III and IV mobilize using devices such as a walker, canes, or powered mobility, while those functioning at GMFCS level V require assisted mobility, such as a manual wheelchair. An overview of key concepts in early detection, rehabilitation services, and therapeutic options for children with CP at these levels is provided, along with practical resources to assist health surveillance for paediatricians caring for this population.