Nine Stones develops critical thinking by putting children in dynamic, problem-solving situations where they must analyse, evaluate, and make decisions quickly. Attackers need to consider how to rebuild the castle efficiently while avoiding being tagged, requiring them to plan and adjust strategies in real time. Defenders must observe patterns of movement, anticipate the attackers’ choices, and decide how to act collectively, which strengthens analytical reasoning and situational awareness. Both teams are encouraged to test different approaches, assess outcomes, and learn from both successes and failures. Throughout the game, students practice weighing options, predicting consequences, and adapting to changing conditions, all of which are fundamental elements of critical thinking.