For me, the powerful aspect to this book is the rhyming aspect. It seems children appreciate the rhythmic quality and certainly research shows this approach can be powerful for early development. As the book's title gives away, this book is about a construction site being put to bed. The author gives a sort of human quality to the construction site machinery. One thing I might do with this one is not put a gender to the machines. I found myself taking the word "him" out when I read it to children so not to assume machinery would have to have a macho quality.