<![CDATA[Logical thinking is important for elementary school students because it supports sequencing events, understanding cause-and-effect relationships, explaining choices, and drawing simple conclusions. The needs analysis in this study indicated that some sixth-grade students experienced difficulty arranging story events in a coherent order and explaining relationships among events. Students also expressed a need for more engaging, game-based activities in Guidance and Counseling (GC) services. This study aimed to identify the need for a story-sequence-based Mahjong GC medium, develop the product, and examine its feasibility and practicality. The study used a Research and Development approach with the 4D model: Define, Design, Develop, and Disseminate. It was conducted at MIS YP Al-Ihsan, Deli Serdang, involving material and media experts, a classroom teacher, and six sixth-grade students. Data were collected through observation, interviews, documentation, needs-analysis questionnaires, expert validation, and user-response questionnaires. The product comprised game blocks, story cards, reflection cards, and a guidebook. Material validation reached 90%, media validation reached 88.57%, teacher response reached 89.06%, and student responses reached 92.50%. The overall score was 90.96%, categorized as highly feasible. The findings support the product's feasibility and practical potential as supplementary GC media; they do not, however, establish its effectiveness in improving logical-thinking skills.]]>
