The study purpose is to document the typical trajectory of perioperative pain experience in Cerebral Palsy (CP) and to identify important predictive factors for the development of chronic postsurgical pain. The main aims of the investigators are to: 1. Quantify the trajectory of pain and opioid use in the context of orthopedic surgery in children with CP. 2. Identify predictors for CPSP in children with CP and develop an applicable risk index. 3. Examine relationships between perioperative pain severity and functional/mobility outcomes achieved by orthopedic surgery in children with CP. Participants will complete: 1. Questionnaires/Surveys via email and text message 2. In-person Sensory Tests 3. In-person Gait and Motion Analysis