Play difficult and interesting things. If you play boring things, you risk losing your appetite. Saxophone can be tedious with too much of the same.
Like anything, you don't force kids to cook. It just becomes part of life - have them be around it, keep them informed - talk about it. I try to relay my passion for it in these ways. The second you try to force anything on your own kid, they rebel.
The difference between the denominational system and the public school system is all the difference between bolstering them up on the one hand and letting them alone of the other.

