In order to defrost the freezer I put a saucepan of boiling water in it. The freezer won and the pan was full of slush/ice crystals. I played with that and irritated the children by showing it to them. They had been busy following their own passions. Then I tipped out the rest of the slush and found I had a perfect ice bowl inside the pan. I ran hot water over the outside, tipped it out and played with the surprisingly sturdy ice bowl!
When I work it out I will upload the photo to go with this story. The moral for me is that house work and idle moments are actually the same thing.