My son is five. So we have not discussed economics other than I have to work so someone will pay me so that he can have shelter, food and toys.

I guess I personally was very comfortable with literature as a child but wouldn't have been with economics. I have seen students who somehow got indoctrined in a way of thinking that is hard to unlearn. I also have never really met many or any who claimed they liked econ as a child. It is very possible that the dearth of good econ teacher at that level was the root cause. I still don't think anyone will miss much by waiting until college, whether that is 14 or 18, simply because the quality of the course is likely much higher.