Toddlers love machines and things that go, and this book gives them everything they want, from a cement mixer to a helicopter to a backhoe. Every other spread has an interactive gatefold that extends the original picture to three pages, revealing something new about each situation. The final gatefold is double, -folding out into a very long train! The last spread diagrams each machine, providing additional information for young readers to pore over again and again. William Low's classically trained artist's eye adds a new layer to this genre, and both parents and children will appreciate the beautiful illustrations, the attention to detail, and the clever situational twists revealed by lifting the flaps.