The book "Developing Math Talent", which I highly recommend, discusses the how math mentors can help gifted math students.
A relevant excerpt is at http://books.google.com/books?id=L5...ing%20math%20talent%20mentor&f=false .
The authors recommend that the mentor not be a parent, even if the parent is qualified. For reasons of cost and convenience I am mentoring my kids.

"To see what is in front of one's nose needs a constant struggle." - George Orwell