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When development is considered as a whole, positive or negative conditions influence subsequent developmental stages in a similar manner. It is well known that during early adolescence—a period in which physical development occurs very rapidly—other developmental domains are also affected. In order to minimize the potential negative effects of this process, educational play constitutes an important factor in children’s development. Educational play is a set of activities that not only provides enjoyment and pleasure for children but also promotes health, enhances personal behaviors, and fosters positive habits. The aim of this study was to examine the effects of educational games implemented over an eight-week period on the physical fitness levels of boys in early adolescence. The study was designed using a true experimental pretest–posttest control group model. In the research design, the dependent variables were the physical fitness characteristics of boys in early adolescence, while the independent variable was an educational games program administered three days per week for eight weeks. The study group consisted of 40 male middle school students in early adolescence, divided into an experimental group (n = 20; mean age: 12.25 years; height: 146 cm; body weight: 38.8 kg) and a control group (n = 20; mean age: 12.15 years; height: 147 cm; body weight: 40.7 kg). Measurements and tests were conducted before and after the program to determine participants’ physical fitness levels, including height, body weight, body mass index, flexibility, vertical jump, 20 m sprint, 30 s sit-up test, 20 m shuttle run, and maximal oxygen consumption (VO2max). Following the administration of pretests to both the experimental and control groups, the participants in the experimental group took part in an educational games program for eight weeks, three days per week, with each session limited to 90 minutes. The obtained data were analyzed using SPSS 24.0 software. Differences between pretest and posttest mean values within groups were examined using the Wilcoxon Signed-Rank Test, while differences between the experimental and control groups were analyzed using the Mann–Whitney U Test. As a result of the study, within-group comparisons revealed that the major findings favored posttest values in all variables for the experimental group. Statistically significant differences were found in flexibility values in the control group, and in flexibility, vertical jump, 20 m sprint, 30 s sit-up test, 20 m shuttle run, and maximal oxygen consumption values in the experimental group (p < 0.05). In conclusion, it was determined that educational games implemented for eight weeks had positive effects on the physical fitness levels of boys in early adolescence. From the perspective of children’s development, it is recommended that educational play activities be systematically planned and implemented during the school period.