The question is not really what is writing, but what is good writing.
Literacy specialists want parents to prepare their children for school by sharing a love for writing, the attitude that writing is important, and the expectation that all children can become successful writers. How to do this?
I devoured adventure stories when I was a kid, tales from the ends of the earth.
It often goes back to reading. Children and teens who read the most tend to become more successful in school than those who do not.