The purpose of this bachelor thesis is to determine in how many books elementary games for developing strength can be found and to what extent introducing elementary games or playful activities with the intent of developing strength can affect children’s ability to climb in the course of five weeks. First, we presented the theoretical framework of the research problem. We included 3-4-year-olds from the public kindergarten Vrtec Pod Gradom in the research. The participating children were divided into two groups, an experimental and a control group. Both groups were tested through elementary games and playful activities, which promote strength development, and climbing wall bars. After the test, we performed a 5-week experiment with playful activities based on body-weight exercises. The activities were performed twice a week, Tuesdays and Thursdays at 9:30. Exercises and climbing were graded with grades from one to three with one indicating the worst and three the best result. After five weeks, a final test for both the experimental and the control group was performed. Our aim was to establish how both groups differed from one another before and after the experiment. The collected data were entered into the SPSS program and presented through a multivariate analysis of variance (MANOVA) in charts and tables. Analysis showed that the children from the experimental group experienced on average greater progress than the children from the control group. We established that the introduction of elementary games or playful activities has a positive effect on the development of climbing skills.