The research aims at the effectiveness of developing special interactive agility on the accuracy of some offensive and defensive skills of squash juniors under 13 years old. The researchers used the experimental method for one group with pre and post measurement. The Egyptian Squash Federation season 2019/2020 AD, and the training program lasted 10 weeks with 5 training units per week, and the most important results of the research were the development of interactive agility that affected the development of physical abilities (horizontal and vertical muscle ability - acceleration - speed of change of direction - movement speed of the two legs - Bearing the strength of the two legs) and it affected the development of the accuracy of performing the straight kick and the dropped kick