Dorothy%20and%20her%20friend%2C%20Polychrome%2C%20find%20themselves%20on%20a%20road%20through%20some%20strange%20places%2C%20to%20the%20Land%20of%20the%20Winkies%2C%20and%20on%20to%20beautiful%20Emerald%20City.%20But%20why%20are%20they%20there%2C%20and%20how%20did%20they%20get%20there%3F%20Princess%20Ozma%20of%20Oz%20sent%20for%20them%2C%20and%20the%20Cowardly%20Lion%20and%20the%20Scarecrow%2C%20of%20course%2C%20to%20take%20part%20in%20her%20lavish%20birthday%20celebration.