Margaret Atwood writes in the Paris Review, “Everyone writes in a way; that is, each person has a ‘story,’ a personal narrative which is constantly being replayed, revised, taken apart, and put together again. The significant points in this narrative change as a person ages—what may have been tragedy at twenty is seen as comedy or nostalgia at forty. All children write. (And paint, and sing.) I suppose the real question is why do so many people give it up?” 

It reminds me of Shaun Tan’s interview, “I think I’m like most people, I don’t remember when I started drawing: most likely as a crayon-gripping toddler. I think everyone starts out as an avid drawer, it’s just a primal kind of instinct, and raises the more interesting question: ‘When do people stop drawing?’ I guess the interest wanes, or is replaced by other skills. Some people, like myself, just keep doing it as a form of extended play from early childhood, using this simple craft to express complex adult concerns.” 

(Tan’s quote is in the opening of Creative Doing.)