This study aimed to formulate and evaluate the effectiveness of a selected exercise program structured, unstructured and semi-structured on motor development of children aged 4 to 7 years. This research was quasi-experimental in terms of purpose and applied results. The design of this study was a pre-test-post-test design with three experimental groups. The participants of the study were purposefully selected from among the kindergartens in Tehran, in which 60 people were purposefully selected and after obtaining the consent of their parents through the consent form, they were randomly divided into three groups: structured, unstructured and semi-structured. Selected movement programs with the structure: standing, , skipping in groups, carrying the ball, hitting the ball, Carrying balloons, keeping balance and which was done according to the instructor's training. Selected unstructured movement programs: tools and equipment were provided to the child and he chose the game according to the individual's choice. Selected semi-structured movement programs were used, one session with structure and one session as desired. A gross motor development test (edit 3) is a process-based test set that is used to measure a child's gross motor skills. To analyze the data, combined analysis of variance and Bonferroni post hoc test was used. In the end, the results showed that the semi-structured group performed better in the post-test than the unstructured group. But between the two groups of unstructured and structured as well as semi-structured and structured, no significant difference was observed in the large motor development variable in the post-test.