We have tried to broaden DS's interests, with mixed success. Starting with things *next to* what he's interested in -- physics is close enough to astronomy, chemistry close enough to physics, biology close enough to chemistry-- and also things that others in the family are interested in-- Mom LOVES the art museum, would you please go with her for an hour?
Sometimes he finds a new enthusiasm, sometimes he participates somewhat grudgingly-- but always he is gathering expertise and familiarity with things that helps him have more of a context for new information and therefore muster a little more interest.
It is tricky to manage the anxiety/disinterest issue-- we have persuaded DS to care about grades somewhat, which helps with motivation, but we don't want him to tip over into thinking grades are a life-or-death issue, either.
