Eve was a three-and-a-half-year-old who was referred by the health visitor for night and daytime wetting. Eve had become dry by the age of eighteen months. Not long afterwards, the family went on a summer holiday at the seaside. They described several amusing incidents and, because Eve had resumed bedwetting at that time, they were keen to establish any relevant events that might explain the wetting. At the time of the consultation Eve slept in nappies and was reluctant to use the toilet during the day, so that often she got herself wet. Eve hesitated and picked up the purple pen. Eve was clearly embarrassed and fell silent. The parents wanted to have a definite prescription to help Eve. But they decided to make a chart, based on which Eve might get a reward. The author suggests they should discuss and bargain with Eve about what this reward might be.