You often read about how incentives can have a perverse unintended effect. I think that I have an example. A couple of weeks ago we decided to pay 20c to each child who was up, breakfasted and dressed by 8.45 on school mornings. On the first morning, the Princess appeared in our bedroom fully dressed at 8.15. A couple of days later she turned up at 7.20. This morning she turned up fully dressed at my bedside at 5.05 am.