The most important mathematics enlightenment for children is to let them know that mathematics is closely related to our lives.
For example, the house number and number, today's date, dad's license plate number and so on.
When I bought fruit at home, I just taught my children to count: "How many apples and oranges did you buy today?"
It's all about connecting abstract numbers with life. Children feel that mathematics is useful to life, and unconsciously cultivate their own mathematical thinking and enhance their interest in mathematics.