Montessori Casa International, Denver, Children Sing On the 31st January 2020, the children of the Montessori Casa International, in Denver Colorado, celebrated Maria Montessori's 150th Birthday. Tags Song United States Denver Peninsula Montessori Institute Celebrates Montessori School of Varna, Bulgaria Children Sing ROI Montessori, India - Maria Montessori's Timeline Montessori China Celebrates Message from AMI 150th Birthday Load More