Oktavya, Nia, et al. “Understanding the Concept of Heavy and Light Through Weighing Activities for Children Aged 5-6 Years”. JAPRA (Jurnal Pendidikan Raudhatul Athfal), vol. 6, no. 2, Dec. 2023, pp. 153-64, doi:10.15575/japra.v6i2.29448.