I admire your courage to play something that's not in the spirit of Christmas for a school's Christmas concert. That's so rock n' roll!
It's a nice little Christmas gift for the kids to hear such a perfect piece of work (even though just excerpts) being played for them. It is Rick's greatest solo album, in my opinion. Hell, you might even inspire some of those kids to hunt down this classic album.
You should make the polo shirts into a cape and get a long blonde wig, just for good measure.
If you do record this, please post it. It would be a real treat to hear. Good luck.