Re: teaching as a student
Never have I seen a kid's Aikido class do sankyo koshinage, or any koshinage now that I think of it. I realize they must do hip throws in Judo kids' classes so it's not that big a deal if the school doesn't make it one....
Anyway, if you have a student of ANY age who expects to get it right the first time and then loses interest, I wouldn't worry about keeping his interest with your teaching. It is the student's problem so long as he doesn't create a disturbance, in which case it's Sensei's problem.