"Convinced that struggle was the crucible of character, Rockefeller faced a delicate task in raising his children. He wanted to accumulate wealth while inculcating in them the values of his threadbare boyhood. The first step in saving them from extravagance was keeping them ignorant of their father's affluence. Until they were adults, Rockefeller's children never visited his office or refineries, and even then they were accompanied by company officials, never Father. At home, Rockefeller created a make-believe market economy, calling Cettie the "general manager" and requiring the children to keep careful account books.16They earned pocket money by performing chores and received two cents for killing flies, ten cents for sharpening pencils, five cents per hour for practicing their musical instruments, and a dollar for repairing vases. They were given two cents per day for abstaining from candy and a dime bonus for each consecutive day of abstinence. Each toiled in a separate patch of the vegetable garden, earning a penny for every ten weeds they pulled up. John Jr. got fifteen cents an hour for chopping wood and ten cents per day for superintending paths. Rockefeller took pride in training his children as miniature household workers. Years later, riding on a train with his thirteen-year-old daughter, he told a traveling companion, "This little girl is earning money already. You never could imagine how she does it. I have learned what my gas bills should average when the gas is managed with care, and I have told her that she can have for pin money all that she will save every month on this amount, so she goes around every night and keeps the gas turned down where it is not needed."17 Rockefeller never tired of preaching economy and whenever a package arrived at home, he made a point of saving the paper and string. Cettie was equally vigilant. When the children clamored for bicycles, John suggested buying one for each child. "No," said Cettie, "we will buy just one for all of them." "But, my dear," John protested, "tricycles do not cost much." "That is true," she replied. "It is not the cost. But if they have just one they will learn to give up to one another."18 So the children shared a single bicycle. Amazingly enough, the four children probably grew up with a level of creature comforts not that far above what Rockefeller had known as a boy."