PURPOSE: The purpose of this study will be investigation of the effect oflight stimulated footsteps pathway on kinematics of gait in spastic diplegic children BACKGROUND: The goal of most therapy procedures for children with spastic cerebral palsy is to increase their walking abilities. Locomotor training usinglight stimulated footsteps pathwayhas been recommended for the rehabilitation of children with cerebral palsy in an effort to improve walking independence and gait speed.

HYPOTHESES: Walking on light stimulated footsteps pathway may not affect kinematics of gait in spastic diplegic children RESEARCH QUESTION: Does walking on light stimulated footsteps pathway have any effect onkinematics of gait in spastic diplegic children?

Inclusion Criteria:

• Age will range between5 and 8 years old.
• They had Grade 1 and 1+ hypertonia according to Modified Ashworth Scale (Bohannon and Smith, 1987)
• Motor Classification System, they were at level I and II (GMFCS)
• They will capable of following commands and comprehend them.
• They will exhibit defective gait kinematics, which can be determined through gait kinematics evaluation.
• All patients who will be enrolled to the study will have their informed consent.

Exclusion Criteria:

• Epilepsy history.
• Taking any anti spastic drugs.
• Both lower limbs had permanent deformity.
• Surgical intervention history.
• Have visual or auditory defects.
• Chest infections or unstable cardiac status.
• Infective skin conditions.
• Markedly high or low blood pressure.
• Individuals with cardiopulmonary conditions.
• Individuals with any pelvic disease.
• Individuals undergoing radiation therapy or chemotherapy.
• Hepatic or pancreatic diseases.