Sophie's First Surgery

Hi everyone my daughter Sophia is 3 years old and she has pffd. She has her left leg smaller then her right. After the doctors gave us the option of leghtening vs amputation we chose leghtening. Now that she is 3 were are going to start with her fist surgery, which to straighten her left femur. She is going to be in a Spica cast for 6 weeks, and I just wanted to get some suggetions or experiences from people who had them or on their children.