This research aims to develop a training program using force training and knowledge of its effect on the development of the skills of throwing children's games for the Sunni stage (12-13) years. The researcher used the experimental method to suit the nature of the research and its procedures. 12 students of the exploratory sample, 25 students of the experimental sample and 25 students of the control sample from the same research community, the strength training program for children has a positive and statistically significant effect on improving the level of throwing competitions in children's athletics for the period (12-13) years, In the experimental group, two training units per week of strength training for children are sufficient for the development of strength in children, provided there is an atmosphere of correlation between safety and pleasure.