Emotional demonstrations (emo-demos) are used in behaviour-centred design to trigger behaviour changes, such as handwashing with soap, by creating disgust and shame. This eight-page case study presents the emo-demo for triggering behaviour changes at vaccination centres, which were found to be ideal places to raise awareness of the importance of washing hands with soap among pregnant women, mothers and caregivers. It provides practical information for implementing an emo-demo of this kind, and a brief discussion on the remaining challenges and lessons learned by the SNV team in Tanzania and their partners on the ground.