Had to prepare dinner so I asked Calder to go practise his piano. And so we were serenaded by Calder's music, piece after piece for 45 minutes, until Ethel decided to use the toilet in the piano room. She came running back. "Mommy, Calder has been playing in the dark! He was squinting at his score!" Oh, no wonder he played so softly. It is not the first time Calder plays piano in the dark. All because no one instructed him to turn on the light.