So I think the rewards day has already come back to bite me, as the kids keep asking what they will get for doing this or that.  “Do we get a candy bar?”  NO.  You get to learn a new song.  Isn’t that enough?  Bonus:  if you don’t get candy for everything, you will have a lower sugar tolerance and might have less problems with your weight as you get older.  Goodness knows our society has enough trouble to that effect!  Maybe I’ll incorporate push-ups as a reward?  You play this song well, you get to do 10 push-ups!  Play it again with a better tone, and you get to run up and down a flight of stairs!  Would this work?  Then again, it’s still a reward for doing something, and would probably backfire.  Life is hard 🙁