Personally, I think children should be taught according to their age.
Suppose you are a beginner and a child who has just entered school. If you don't have a certain understanding of the structure and radicals of Chinese characters, it is appropriate to follow the teaching methods in the textbook. Because the teaching methods and identification methods in textbooks belong to the basic and standardized learning process. At this stage, if you teach him the writing methods and strokes commonly used in calligraphy, the mastery of these radicals may play a certain role in writing, but the child's cognition is limited after all, and the written words can only have this part of the calligraphy characteristics. You can't fully master other technologies.
For example, write the prefix "damn". Horizontal, vertical (point), vertical (point). Or horizontal, vertical and left. These are all regular basic strokes. But in running script teaching. The stroke order of the prefix "meter" is vertical (dot), lifting, skimming and stopping first. Write with four strokes instead of three strokes. Writing is better, but it may be regarded as irregular and irregular writing by teachers in present preschool education (many Chinese teachers have never studied calligraphy), but it may reduce children's enthusiasm for calligraphy learning at this stage.
So I still hope to start from the basics. Since elementary school. From the official start. Finally, when children have a certain learning ability, analysis and appreciation ability. Let him change in the direction of calligraphy strokes.
I hope it helps you:)