Lubis, S.P.A. and Kamtini 2023. The Effect of the Educational Game "Edu-Games Bobby Bola" on Cognitive Ability (Using Number Symbols to Count) Children Aged 5-6 Years at Pembina Tanjung Morawa State Kindergarten 2022/2023 Academic Year. Indonesian Journal of Advanced Research. 2, 8 (Aug. 2023), 1085–1096. DOI:https://doi.org/10.55927/ijar.v2i8.5362.