Dian, D. et al. 2022. Brain Games and Gymnastics on Increasing Concentration Power of Early Childhood. Jurnal Obsesi : Jurnal Pendidikan Anak Usia Dini. 6, 6 (Sep. 2022), 5615–5620. DOI:https://doi.org/10.31004/obsesi.v6i6.2487.