Child workers on Nicaragua’s coffee plantations have become researchers, generating knowledge which leads to action to help solve some of the severe social problems that affect the rural communities where they live and work. This article first looks at how child researchers are seen in the existing literature. It then traces the history of the approach used, known as Transformative Research by Children and Adolescents, from its origins in ‘Children’s Consultancy’ in the United Kingdom in the 1990s, through its adaptation to the Nicaraguan context and subsequent metamorphosis into today’s transformative research approach. It discusses the concept of ‘transformation’ in social research, and CESESMA’s alternative ‘four transformations’ framework, with its emphasis on a coherent concept of empowerment. It then identifies four things child researchers need from their adult supporters: appropriate and effective research methodology, skilled and sensitive process facilitation, technical support and a responsible attitude to child protection that recognises but does not exaggerate risks. It concludes by highlighting some challenges to be addressed in further developing and extending the approach.