15 Children in this group will receive a designed physical therapy program for 60 minutes per session, three times a week, for three consecutive months.

Children in this group will receive the same designed physical therapy program for 60 minutes per session, three times a week, for three consecutive months. while the Nordic walking training for 20 minutes will replace the functional gait training.

it will be applied for for 60 min weekly for 3 successive months in the form of three sets of exercises (15minutes each) as follows:

• Flexibility exercises to restore joint mobility of soft tissues.
• Static and dynamic balance exercises
• Functional strengthening exercises.
• Functional gait training.

The gait parameters will be assessed by kinovea software. Kinovea, free 2D motion analysis software, was created in 2009 via the non-profit collaboration of several researchers, athletes, coaches and programmers from all over the world. It enables the analysis of distances, angles, coordinates and spatial-temporal parameters frame by frame from a video recording. These measurements can be made from different perspectives, since the software carries out calibrations in non-perpendicular planes to the camera-object line analyzed. spatio-temporal parameters will be measured