Fitriani, Rohyana, Nopianti Nopianti, and Zuhut Ramdani. 2021. “Development Of Numbers Pyramid Media For Developing Cognitive Aspects Of Children Aged 5-6 Years”. Early Childhood Education Development and Studies (ECEDS) 2 (2), 34-39. https://doi.org/10.35508/eceds.v2i2.5644.