摘要：I n our previous article (Croft et al., 2012) we described the work of the Children's Food Trust and the complexities/challenges they encountered with trying to achieve meaningful and permanent change in the dietary behaviours of school children. This case study was used as an example of the multiple agencies, their interrelationships, the vested interests and resistance to change that must be considered when dealing with health behaviours. It is exactly this complexity that we wished to challenge university undergraduate students to grapple with during the Grand Challenges project that ran over an 11-day period at the University of Exeter this summer. The Grand Challenges project was designed to be a novel learning experience for the students, allowing them to hear from a multidisciplinary range of experts and to work successfully towards achieving an outcome related to the key question at the end of the project
