This paper examines a particular methodology of teaching engineering design to undergraduate engineering students, which relies on Lego[R] Mindstorms[TM]. A number of important issues are addressed, including the timing of the design module within the programme, prior knowledge required and assessment components. The module, which has been running for three years, was found to have many positive attributes, not only in relation to the core design activity, but also in generating good team-building and engaging students with the degree programme. (Contains 4 tables, 3 figures, and 1 note.)