> Tit for Tat:When children are faced with the job of cleaning up a joint mess, suggest “you pick up one, then he picks up one,” said Mr. Raeburn. “We had mixed results with Tit for Tat,” he admits. His 9-year-old son was able to manipulate his 6-year-old brother into doing more. “This probably works better with children who are closer in age, or at least both over 7.”
It's the exact opposite with my kids - neither of them want to tidy up, but the older one will get on with it, while the younger prefers to cry and sulk while her sister does the work