Kindergarten in the Digital Era: Developing Engaging Android-Based Educational Tools for Letters and Numbers. Utamax : Journal of Ultimate Research and Trends in Education, [S. l.], v. 5, n. 3, p. 192–203, 2023. DOI: 10.31849/utamax.v5i3.14539. Disponível em: https://journal.unilak.ac.id/index.php/UTAMAX/article/view/14539. Acesso em: 25 mar. 2026.