Russell, your experience brings to mind, too, the idea that "we" (those influencing children in schools and beyond) could convey to children that what goes on in art class is only one version of creativity. In fact, it's only a small slice of creativity.
I like this. Also, it actually reminds me of a question that comes to my mind every time I hear a point made along the lines of "all kids are creative, have creative confidence, etc." Even though I'm inclined to believe that this is true (which probably is the reason that I forget my questioning of it in between hearing claims), I always wonder if there is any research evidence for the claims. In other words, do we even know that something is being removed?
Some ideas, like this wonderfully resourceful one, may be of the nature of "of course we should do this ... without delay ... why wouldn't we?" There's almost zero extra cost. In itself it's not enough to meet the challenge, but it has the advantage of leverage (effects way beyond cost, since there is essentially no cost) and instant feasibility. Plus, it fits into the culture in a way that can involve the population at large. For example, parents can be involved with their children ... the tool is not isolated within classrooms. There are going to be many complementary ideas needed. This one on its own isn't enough, but it's a great idea. Congrats to submitter on great thinking!