It is important for young children to understand that not everything that is good for one person is good for another.
Sesame Street does their “What’s the word on the street?” segment, teaching kids about a new word. I’m not sure when this aired. Surf
If kids could learn this basic idea when they’re very young, maybe it would be easier to understand something like a friend having Celiac Disease, when they get a little older. Just my two cents.