Folie Days offers a practical, environmentally-friendly and cost-effective way to organise festivals in La Villette park.Its structures are based around a cube shape, with a collection of modular accessories that meet the requirements of a festival. In keeping with the identity of La Villette, they can be custom decorated according to the specific event. Drawing on contemporary values, the design is characterised by the use of local, reused materials as well as the manufacturing techniques of the on-site FabLabs.Used here for the Villettecità festival organised by Le Trabendo and Kermès, the structures boast a colourful, festive identity through accessories inspired by symbols of Italy.