This chapter is bridging the gap of Human Computer Interaction (HCI) and Requirement Engineering (RE) where the intended users or appropriators of the technology or service are children and young people. The research draws theory and practices from several disciplines: Human Computer Interaction (HCI) and Interaction Design (IXD) but also from psychology, educational technology and games.Research into children and young people’s requirement needs as Player, Learner and User (PLU) is a main theme in Interaction Design for Children (IDC). This chapter focuses on the challenges and issues that arise when conducting requirement gathering with children and young people; it looks at common methods, approaches and methodological innovation in the current research while treating children as research partners in the requirements gathering process