Draw a Story

Before a child learn to write, he can draw a story and tell it aloud. He can create his own story characters and add in interesting scenes before he knows how to spell words. When he picks up phonics, help him blend and add in simple keywords to the picture. If he's into comics, add in thinking or speech bubbles to the characters.

The story need not be complicated. It can even be nonsensical. Depending on the age of the child, ask him "why, where, what" questions. Respect the reply from the author and ask "what if" something else happens, would the ending be different.

This builds up the fundamentals of composition writing without words. The next step would be to write simple sentences that link the story.