All Aboard! The Airport TrainHop on board to explore the airport in this accordion style book with flaps to lift on every page. All aboard! This accordion style book folds out car by car, taking readers on a tour of an airport train inside and out. Readers are asked to help a girl bound for summer camp find her missing plane ticket, and as they search, they are introduced to all the passengers on the train. There are vacationing penguins, glamorous movie stars, traveling