Using the rhyming poetic structure of This is the House that Jack Built, author Yvonne Ng takes young readers on a cumulative path through the inner workings of a steam engine, from the big wheels rolling on the tracks all the way to the engineer driving the train.   Fun sound effects and repetition give the sense of a moving train, making a great picture book to read aloud. Richard Smythe's charming illustrations show travelers on a journey across the countryside, and simple cutaway diagrams with labels show readers the inner parts of the train. An author's note at the end explains the concept of reverse engineering and how adults can explore how things work with kids.   Perfect for STEM or STEAM lessons as well as a fun read-aloud for young train fans, this book will inspire readers to examine how things work.