In this section, we follow the exam format with a simple question around a clinical picture, X-ray or a video clip, followed by increasingly difficult questions to explore candidate depth and breadth of knowledge. Some of the questions are made deliberately difficult and beyond average candidate level, some are easy and the majority are average. We also support some of the answers with clinical photographs to create mental images to aid recall information during the exam. The online version of this book will have more cases, videos and discussion. This section complements the first edition of this book, the postgraduate paediatric orthopaedic book (the green book)  and the third edition of the parent book. Candidates are strongly encouraged to read all of them to have a better overview of the paediatric section of the exam.