Just wanted to point out that there are a couple of evolutionary factors at work here. One is that food really does taste different to children. Kids prefer sweet foods and hate foods that taste bitter to them. In the hunting gathering days that helped our ancestors survive childhood, since toxic plants tend to be bitter. As we get older, we tend to enjoy bitter foods more (though I still avoid arugula).

And pre-adolescent kids have an aversion to risk-taking that, again, helps them survive, but would be abnormal or dysfunctional in an adult. So, file those traits under normal, yet infuriatingly inconvenient.