Prudence Phillipson of England uses this analogy. When her children were young the floor of their playroom often became messy with games and toys strewn everywhere. Prudence got her children to clean up their toys and games by telling them she was going round the corner to the shop. "When I come back," she warned, "everything should be in its place." She would then give each child a task before she left. The oldest child would be given more complicated tasks while the simpler ones would go to the …