I think that if I were to go back to substitute teaching, I could still do that...BUT...to reinforce the "use it or lose it" adage...I once played the pipe organ (actually, gave my college requisite recital playing the pipe organ)...was also a church soloist for many churches for many years...but, if I were asked either to play or sing these days, I would definitely have to refuse because I have NOT used my music, now, for many years; therefore, I have LOST the ability. Of course, if someone were to offer me $1,000 to sing/play for his/her wedding, I certainly would try!!!! I merely wanted to stress, here, the importance of "using or losing"...I should have practiced what I've preached here, I guess!!!!