ROI Montessori, India - Maria Montessori's Timeline Children of Royal Oak Internatio (ROI) Montessori in Nashik, Maharashtra State, India celebrate the 150th birthday of Maria Montessori by sharing a timeline of her life. Tags Maria Montessori Video: Geneva Admin Course Sings Montessori Casa International, Denver, Children Sing Nienhuis Tulip Puzzle Promotional Video Kate Oliver Singing My Hand in Your Hand China Conference Premieres Montessori 150 Song