To celebrate the 35th birthday of Action Contre la Faim, together with 84.PARIS, we worked on an interactive stunt to take place during the fête de la musique in Paris, France. In 4 famous places in the city, connected pianos were installed so anyone passing by could play a note or a whole piece. The interactive installation played a two-sided movie representing the 35 years of actions of the NGO. Each note played on the piano was transforming the dark movie of wars into its positive version of humanitarian action. The event had many PR on TV, press and social media gathered in a social wall specifically developed for the occasion.