The oldest (after a career in education) became the church organist in her retirement years. The other 2 daughters had lifelong careers as music teachers. I don't know about the sons -- one played the violin all his life, but made his living as a chemist.
My father managed to learn to play enough piano (his assigned instrument was cornet) to impress my mother enough to marry him! BTW, he was taught the little bit of piano he did know (a very impressive rendition of the first page of The Swan) by his sister who actually was a cellist. Surely that was an imposition on her free time as a teen when she could have been out "having fun". s/off!
The Duggars are fantastic people who just happen to love children. We were watching them on Huckabee one night and not one of them was misbehaving, not even the babies. They were so happy and smiling the entire show. In fact, I have never seen them when they didn’t have a smile on their faces and very calm and composed.
If I had that many children I would be hanging from the ceiling somewhere.