Diabetes mellitus is a growing non-communicable disease that increasingly affects children due to unhealthy dietary habits, inadequate physical activity, and sedentary lifestyles. Early preventive efforts should begin in elementary schools through interactive and age-appropriate health education. This community service program aimed to improve elementary school students' knowledge of diabetes mellitus prevention using an educational snake-and-ladder game. The activity involved 30 students (10 boys and 20 girls) from SDN 16 Sumbawa. The intervention consisted of interactive health education on diabetes mellitus, its risk factors, healthy eating habits, physical activity, and healthy lifestyles, followed by an educational snake-and-ladder game, group discussions, and reflection sessions. Program effectiveness was evaluated using a pre-test and post-test design to assess changes in students' knowledge. The results demonstrated a substantial improvement in knowledge, with the mean score increasing from 58.67 (SD = 12.45) before the intervention to 84.33 (SD = 10.21) after the intervention. The game-based learning approach promoted active participation, encouraged discussion, and reinforced key health messages in an enjoyable learning environment. These findings indicate that the educational snake-and-ladder game is an effective and engaging medium for improving elementary school students' knowledge of diabetes mellitus prevention. Integrating this approach into school health promotion programs may help establish healthy behaviors from an early age.
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