Super interesting that you raise the use of psychology in child nutrition but nothing more accurate than that. It turns out that the eating habits come from the parents in many occasions I see people who try to make their children eat vegetables when the children observe that they do not eat them, everything in the first years of the children happens by imitation and that is well explained by the behaviorist theory from there that the best thing is to be intelligent and make the children eat healthily seeing that we do it. We should also use our intelligence to combine foods and present them in an attractive way, this helps a lot. Thanks for this very interesting post.