Implementation of the Cheerful Tray Congklak Game (Traycer) to Improve Numeracy Concept Skills at the Nice Kids Malang Kindergarten. Efektor, [S. l.], v. 13, n. 1, p. 52–63, 2026. DOI: 10.29407/e.v13i1.28252. Disponível em: https://ojs.unpkediri.ac.id/index.php/efektor-e/article/view/28252. Acesso em: 1 may. 2026.