Book excerpt: "You know, Dr. Dan, that kid is from my planet." With in-depth descriptions of LEGO®-based therapy in action, this book explains how and why it helps to promote the development of social skills for children with autism spectrum disorders (ASDs) and related conditions. Written by Daniel B. LeGoff, who pioneered the approach, this book comprises a series of case histories of children who participated in LEGO® therapy. It traces the development of the evidence-based approach, shares the clinical insights gained along the way and highlights the principles which should be at the core of all effective treatment and educational strategies for children with ASDs. The case histories have real practical value for those working with children with ASDs and also help to demonstrate the subtleties of the adult facilitation role for professionals running sessions.