Oldest is 12 now, all three do very well.
I'm still searching for more, though, because "You're a hard worker," has actually been one of the things I've been trying, but it often feels- wrong. Stilted, like I'm trying too hard to teach instead of just sincerely offer the poor kid the damn praise. ;) Maybe I just need more practice, but I feel like there's room for improvement in the language there. :D :)