I have heard of theories which state that there is a 'critical period' for learning music, just as there is for learning to speak. If the child is 'included' in music in the same way that he or she is 'included' in speech, then music should become a part of existence. This does not imply strict teaching methods, but rather exposire, of the sort Sinsull mentioned. I don't know much about the science behind this, but it certainly has a ring of truth for me.

In other words, sing and play to her as much as possible, and make it FUN! It is the fun part that motivates the child to continue.

Cheers,

Catrin