In an amazingly spontaneous display, my kids burst out of their room, where they had been playing together, loudly singing carols on top of their voices. They arrested the piano & began banging away, singing carols with vigour and vim. I was amused and pleased, and had to film them! Here and here.
The second video features Dan doing a falsetto and Ben coming in extra low.
What was really heartwarming was that they were totally into it, and putting in a lot of energy into singing with passion! Check out the videos and see!