Deep Friction Massage in Children With Spastic Cerebral Palsy

The aim of this clinical trial is to determine whether deep friction massage and stretching reduce muscle contraction in the calf muscle. The primary questions it seeks to answer are: * Does deep friction massage or stretching reduce muscle contraction? * Does deep friction massage or stretching improve walking? * Does deep friction massage or stretching increase ankle joint range of motion? Participants: Participants will undergo either deep friction massage or stretching exercises for 10 minutes, three days a week, over a period of six weeks.