The aim of Parti-CP is to gather profound knowledge about how children with CP, their siblings, and their families as a whole experience participation in Switzerland, then use this knowledge to formulate evidence-based recommendations. The mixed-methods study will include four work packages with qualitative and quantitative elements. Parti-CP is nested within the Swiss Cerebral Palsy Registry at the Institute of Social and Preventative Medicine (ISPM) at the University of Bern, and will be conducted in collaboration with the University Hospital Bern, the Swiss Children’s Rehab at the Children’s Hospital Zurich, and the Zurich University of Applied Sciences (ZHAW).