"Ahaa!", an architectural playground which was made as an additional facade with the purpose of making the visitor aware of the actual architecture of the existing building Cosma Caixa in Tibidabo, Barcelona. The triangular "wood skin" traveled from the entrance with the purpose of crossing and opening the different junctions of 3 joined buildings. The fractal effect of the triangular structure gave the facade the ability to transform in purpose from wall, to ramp and floor for further appearance as topography and different features such as as chairs, benches and etc.