I have the same problem with a 7 year old before. She is talented but VERY mischevious, and hyperactive. Goodness, I don't know how we lasted for 3 years! When I first taught her, she couldn't keep still for 5 mins! I have learn't to be more stricter now, and am not afraid to tell her mother if she misbehaves. In fact, I play the game '3 strikes and your out!' e.g. if she doodles on piano, draws on her book, refuses to play etc.. I will call the mother immediately but I always warn her first. She usually calms down after that and begs me not to tell her mother. Another trick I used is to play games to motivate. I guess, make boring things into games for her. e.g. finding notes 'no peaking', playing tick tack toe or hangman for trouble spots, flashcard races, rythym games. We usually start learning pieces by rote first. I even play the game 'copy cat' for that. She has matured now, and I feel less need to play all these games already. The buttons on the Clavinov could be a distraction for young kids. Maybe there's a way to cover it with a sheet or something while teaching?