Last week we figured out that, with enough finagling, all the kids and I can perform
The Seventh Horse, by Echo's Children, together.
I have to sing an octave low and H has to play an octave high for half or it. C doesn't know the proper hand position for that many notes, but his instructor said he'd help him with it if he brought the sheet music in. S can play it as written and plans to use it for her recital peice next month.
Our current mad plan is to learn it well enough to perform as a group at TusCon in November.