Nudgeathon is a behavioural change competition, in which students develop solutions to real-life social issues. Over the course of two days, students attend lectures in behavioural science and design thinking, before spending the next day and a half on working on a given problem brief. The problem briefs are provided by Nudgeathon Partners. So far, we have collaborated with Which? and the Behavioural Insights Team, with the goals of nudging people to save money for a rainy day and to encourage women of childbearing age to take folic acid supplements, which can help prevent birth brain and spinal defects such as anencephaly and spina bifida. The main objective of Nudgeathon is to crowdsource ideas based on behavioural insights and to develop implementable solutions to social issues.