I know some children are picky eaters so I didn't think much of it when my young son didn't eat a good variety of foods - I figured he'd grow out of it. But now he's 15 and if anything he seems to be getting worse. He never touches a fruit or anything "green" (or red for that matter). Potatoes and sweet potatoes are his only foods from the vegetable kingdom, unless you count ketchup. Is there any hope that he'll be a normal eater when he's an adult? Should I be worrying about this?