Blackcat, I understand your frustration! My DS is too young for those issues, but I can tell you my experience when I was in orchestra/band. I kept switching between the sax and trombone. Finally, my mom put her foot down and said that the only way she was paying any more money for music stuff unless I practiced consistently. She would pull me away from whatever I was doing and be an audience. If I got mad at her for it, then that was the end of it. I quickly learned the hard way.