Indriyani R, Taswadi, Sobandi B. Analysis of Cognitive Development Theory by Jean Piaget on Color Games on Early Childhood Development. eduline j. educ. learn. innov. [Internet]. 2024 Oct. 10 [cited 2026 Nov. 1];4(4):504-11. Available from: https://journal.arrus.id/index.php/eduline/article/view/3068