My 14-year-old son now plays fantasy football. Has for a couple years, but now he's doing it totally on his own, without any help from his Dad. It's more of a lark for him than it is for me; he's in a league with a bunch of buddies and he clearly doesn't take it very seriously. That's probably for the best. I think he likes the midweek trash-talk and trying to make trades more than actually following the action on Sunday.
That said, he has already found out how cruel fantasy football can be.
This story is completely true and entirely unembellished.