What would you do with a million dollars? In this story, Ben and Melissa work for their neighbors, Mr. and Mrs. Cash, to earn some extra money. By the time they finish helping their neighbors, Ben and Melissa discover how to someday become millionaires. They have a great time imagining what they would do with a million dollars, but they also learn about money. and the banking process. The mathematical connection is understanding the various denominations of money and what each will buy.