Forty children with spastic diplegia of both sexes will be selected with the following criteria:  Inclusion Criteria:  Their age will be ranged from 6 to 8 years. The degree of their spasticity will be ranged from 1 to 1+ according to Modified Ashworth' Scale. They will be on level Ⅰ or Ⅱ on Growth Motor Function Classification System (GMFCS).  Exclusion Criteria:  The Children will be excluded if they have one of the following:  Severe visual or hearing impairment. Fixed deformities or surgical interventions in the lower extremities. Botulinum toxin injections in the last 6 months.