First of all Marcus, you should be aware that teenagers know everything. Fortunately it's a phase that passes and if you live long enough, you can both become great friends once more.

What he was referring to re the iceberg...Hemingway believed the deeper meaning of a story should not be evident on the surface, but should shine through implicitly...and even the best of writers fall into the trap of telling rather than showing.

I think what could happen, is the two of you could work together. He could tell you what he thinks, and, as I used to say to my students when writing collaboratively, You can accept it, or hand it back with a compliment about the idea. That way, neither of you loses face.

Some of the concepts are a little mature if you are thinking late primary students, but that's where you can work together. I suspect your son is a writer as well.

Loved the ending. Was not at all prepared. :)