I was talking to one of my teachers about this a few months ago. We were talking about why little kids tend to hate veggies. My teacher said that toddlers don't really taste much. They can taste the difference between sweet and bitter, but most of the time things taste bland to them. They tend to like the foods that they see others eating. If a parent leaves the kid veggies to eat but then eats a big mac, the toddler is going to want what the parent is eating. Also, of they see their parents eating vegetables and the parents make faces at the food, or they don't finish it, then the toddler is going to think that they shouldn't like it either. My teacher said that toddlers have to be trained to eat healthy foods and that eventually they might like them.