Book excerpt: Thera-Build' is a LEGO®-based therapeutic approach for improving children's emotional well-being. Participation in Thera-Build groups can help to boost self-esteem, address common issues such as anxiety and anger, support social development and build positive attachments. This inspiring and user-friendly guide explores the power of play, introduces the basics of brain plasticity and attachment theory, and shows exactly how to set up and run an effective Thera-Build group. A wide range of imaginative games and activities is included.