그런데 유치원은 19세기에 결정학자였던 프리드리히 프로벨이라는 사람이 만든 매우 형식화된 교육 시스템이었습니다.
And kindergarten, by the way, was a very formalized education system created by a man named Friedrich Frobel, who was a crystallographer in the 19th century.