Inclusion Criteria:  Cerebral palsy DIfficulties from lying down to sitting posistion  Exclusion Criteria:  Surgery or injection of botilium toxin in the last year. Scheduled surgery or injection of botilium toxin. Uncontrolled seizures. Do not run elementary commands or play a test representation. Autism. Syndromes without OP. Serious vision problem. Absence from the treatment program for more than a week.