Every so often, parents really should force their kids to try things again. Your tastes change. A lot. I didn't used to like raw bell peppers, now I do. I didn't used to be able to tolerate vinegar at all, now I dip my bread in it. I didn't used to like raw broccoli, now I can eat it. It's important to try everything at least once and keep trying things. You never know when you'll grow to like them. The trick is not to force them to eat all of it. If the kid really doesn't like something, forcing them to eat all of it will only make them hate that food. But it is important to help push them to be adventurous eaters.