This is one of a series of activity/observation game picture books focusing on a single day in a busy place. This book is set at the factory, where people come and go, and lots of different things happen. At the back of the book are some fold-out flaps with lists of puzzles to solve on every page. Philippe Dupasquier has also produced three Robert books, The Great Escape, I Can't Sleep and Follow That Chimp!, which was originally published in serial form in the children's magazine Snap.