Ben and my dad often play "store" at my parents house. Ben is the cashier and my dad buys his toys with play money. The other day Ben ran into the kitchen with a puzzle...
Ben: "I buy this ma'am?"
Me: "Do you have any money sir?"
Ben: "No" (Bows his head and turns down his lip.)
Me: "How are you going to buy this puzzle if you don't have any money?"
Ben: (Thinks for a minute.) "I know! I go to the store and buy some money."