a) What do you need to be happy in life?
b) Is money an accurate measure of happiness? Are they willing to make a trade-off between reducing their earnings to spend more time with their friends and family? What trade-offs did their parents make?
c) What if, after making purchases at the local drugstore, you realize that the cashier forgot to charge you for an item? Or suppose a waitress forgets to charge you for the drink you ordered with your meal?