Isabel wants a Nelly Longhair doll, but she has only fifty cents. To make the ten dollars to buy the doll, she must come up with a plan. With the help of her friends, Isabel starts a car wash business and is on her way to earning the money! Will her business succeed? This picture book uses the story of Isabel's car wash business to explain simple principles about investing. An essay at the end of the book explains how the story relates to investment in the stock market.