Several families interviewed for this book recommended the oldest persuasive tool known to man: bribery. Each child is given some amounts of virtual cash, 25-30 cents, for each hour of good behaviour. The same amount is subtracted from their accounts for breaking the rules. All purchases for fun - whether souvenirs, ice cream, or otherwise - come out of their own individual accounts. No balance, no goodies. This often requires more self-control on the part of the parents than the children.