Maybe not your cuppa and depending on your family might not be for your kid but this is my grown up sisters work ( I don't guess she minds me mentioning it or else she wouldn't have made a web page).
http://asylumlabs.com/cast.html. It does not look to me like technical training has thwarted her inner child at all. I've mentioned before that I've got told in another forum that somebody believes teaching children art techniques robs them of their individual creativity expression and makes them all have cookie cutter boring kid artwork. Which does seem to be one train of thought you could follow. I believe the opposite. I believe that teaching allows kids the ability to express themselves. Just my opinion.
If you're looking for a little understanding then I sympathize with the nostalgia of things we've let go of. We always let go of an awful lot when we reach for something new. But it's always worth it because we can recognize old things when we see them again.
A saying that agrees with my idea, "a teacher told one half of his art class to make only one clay pot but make the best, most perfect pot they could. He told the other half of the class just to make as many good clay pots as they could. Guess which students produced the best, most perfect pots? The half that practiced more and tried more often". So I personally don't think learning new common techniques will take anything away from innate ability. But I've seen a lot of posting that they personally think it does so YMMV.
