Introduction: Children are different in their physical, cognitive, and motor development as well as motivation to move. The current study aimed at designing the children movement motivation questionnaire (CMMQ) in the age range of 3 to 6 years.Methods: The present methodological research used the Waltz 4-step method to design the questionnaire. The psychometric properties of the instrument such as face validity, content validity, construct validity, and internal consistency were determined. For this purpose, 580 parents and their male offspring were randomly selected from preschool and kindergartens of Khoramabad City, Lorestan Province, Iran, and enrolled in the current study.Results: Based on the theory of motivation and review of the literature, 40 items of the questionnaire were extracted. After determining the face and content validity of the questionnaire using qualitative and quantitative methods, a 40-item questionnaire was assessed. However, the result of exploratory factor analysis reduced the number of items to 34 and categorized them into 4 groups of activity, explorative, motivation, and adaptation. These 4 factors explained nearly 64.26% of the variance of the questionnaire. Also, the internal consistency (Cronbach a) was 0.864.Conclusions: The findings of the study indicate that the 34-item CMMQ is an appropriate tool to evaluate movement motivation in children 3 to 6 year, in spite of features such as designing based on the results of review of the literature on motivational theories, simple scoring, reliability and validity, and fitness and feasibility of the tool in different situations evaluated by parents, trainers, nurses, and occupational therapists.