My practicing tip for boys- play it like a video game! If you make a mistake or "die", go back to the beginning and try to play the line slow and accurate with out "dying". They pass the "level" when they make it to the end of the line with no mistakes! Then they can go on to the next level...or line! If they "die" on that level, they just go to the beginning of that line.
It's amazing how that simple concept changes everything!l...especially if they enjoy beating a challenging video game!
Good Luck all you amazing pianists!