“Designing the Educational Game ‘Calcuboy’ for Children Aged 4 to 7: A Case Study at TK Dharma Wanita 1 Tarokan and SDN Tarokan 1” (2024) Nusantara of Engineering (NOE), 7(2), pp. 242–249. doi:10.29407/noe.v7i2.22036.