From a mother's (and aunt's) standpoint, two of my nephews, when they were starting out on vegatables, would only eat carrots and sweet potatoes for my sister, no other green vegatables.  They were a definate shade of orange, primarily seen in their face, ears and skin creases (tight baby fingers, thigh folds, etc.  I used to call them Beta babies.  It definately happens, but your diet has to contain large quantities of beta carotene (relatively speaking).  Every once in a while I see a Beta baby in the store and just smile - you know mom and dad are giving in to their baby's every desire at 6 months old!  Regards, Barbara