What game do Jacob, Hank, and Sarah play in Chapter Five? What happens afterward?

Jacob, Hank, and Sarah decide to play monopoly, and Sarah proposes that they play with real hundred dollar bills from the plane. Jacob begs, too, and Hank gives in but soon notes that the thrill wears off quickly as they buy imaginary property with the real money. After Hank puts Jacob to bed, he counts the packets of money used for the game.