... an evolutionary structure in aim to combine the different existing programs with a future development. The superposition of these independent stratas: the programmatic bands, the circulation, the functions, creates a dense system of activity knots. The congestion and stimulation of activity related to a playful imaginary of adventure, exploration, experiences…has been the main vector of the design. The school so is designed as a field of activity, which permanently shift the reductive conception of the school as learning box into a playful open architecture.