A famous saying with "kindergarten" seems to mean that you learn the most in kindergarten, and good habits are cultivated from childhood.
1978 at a meeting of 75 nobel prize winners in Paris, a reporter asked one of them, "what do you think is the most important thing in your life? which university and laboratory did you study it in?" ? The white-haired Nobel Prize winner calmly replied: "Not in the university, not in the laboratory, but in the kindergarten."