WRT to developing your kids, I was told when I was young that I "must" play an instrument, and take private lessons. My only choice was which one. I chose trumpet cuz my dad played it.
I didn't become voluntarily committed to music until a few years into it when band (and eventually orchestra) became fun. So personally I am a fan of this draconian method - might not work on all kids though. :-)
I got started with soprano clarinet because when I was a kid, my dad pulled out this old metal stick that he said belonged to his grandfather. I wanted it, so he said he'd give it to me if I learned how to play the clarinet. And so, I did.
Funny enough, despite my multiple offers to restore it, he kind of wants to keep it in the old dingy state. I suppose it's kind of nice to keep it as a time-capsule of sorts, perhaps memories fade when things are made new.