Is it too early for children to learn calligraphy at the age of four and a half?

In fact, it is ok for children to learn calligraphy in the middle class. If children can sit still and teachers teach well, their learning effect will not be worse than that of children in large classes. The key is that children like calligraphy themselves. Of course, teachers are also very important. My child is studying calligraphy in Guo Xue Bo Ju. On the first day of class, the child told me that the teacher was very careful and the child liked the teacher there very much. Naturally, he is serious in class and writes consciously. I think a good teacher is the motivation for children to learn. what do you think?