<qa>  What is the equivalent of room air?The study is to evaluate the effectiveness of hyperbaric treatments and the potential longer-term effects in children between the ages of 3 and 8 years with spastic cerebral palsy CP. One group will receive 100 oxygen and the other group will receive the equivalent of 21 oxygen room air. The children will receive pre-treatment testing baseline. After 40 experimental treatments are completed, the children will be retested at 0, 3, and 6 months to evaluate any changes. 