Puspitasari P, Syarifuddin S. Optimizing the Use of Building Blocks to Improve the Mathematical Skills of 5- to 6-Year-Old Children Through Lego Duplo Play. JETTI [Internet]. 2026 Jun. 3 [cited 2026 Jun. 8];4(1):172-95. Available from: https://journal.pusmedia.com/JETTI/article/view/332