Simatupang, Nurhenti Dorlina, Sefy Amaliatus Sholichah, and Irena Agatha Simanjuntak. 2023. “Introduction to Counting Symbols in Early Childhood With Stick Math (STIKMA) Educational Tool Games ”. JPUD - Jurnal Pendidikan Usia Dini 17 (2):297-311. https://doi.org/10.21009/JPUD.172.08.