The article suggests that the concept of “success in sports training of children” is integrative, including interrelated and correlated components. From the point of view of the authors, the evaluativeperformance component is one of the most necessary to achieve success. The authors propose to improve the indicators of this component through the trainer-child-parent interaction system, which consists in the use of digital technologies, as well as in the development and application of the educational program of interaction between the trainer and the parents of the children involved in “Success of your child”. The article also presents the diagnostics of the evaluative-effective component, which consists in testing children by using the questionnaire of Stolin. and Panteleeva. Testing was carried out in the course of experimental work in two stages: at the ascertaining stage (before the introduction of the educational program) and the control stage (after the introduction of the educational program). Based on the results of the experimental work, the authors made conclusions about the need for a deeper introduction into the practice of interaction between parents, their children and the coach.