I've never seen anyone else mention this on the boards or anywhere, but does anyone else's kids play instruments, or is there just some sort of glitch/mod I have installed that causes this awesome occurrence?

It doesn't happen often, but every once in a while Sofie will go stand by the fire and play a song on the lute, the little flute type thing, or the drum. It's awesome!

She and your bard have combined.
She a Priest and a Sabre Cat.

She should also get a Scholarship to the Bard's College soon.