Spanish artist/designer Javier Lloret has created what is possibly the nerdiest (and coolest, in our books) interactive façade ever. Puzzle Façade, a 3D-printed interface cube that's connected to a digital wall by Bluetooth, lets passersby try their hand at solving a larger-than-life Rubik's Cube. The tools and pieces behind the interface cube The handheld cube is made up of 3D-printed exterior pieces (the twistable cubes we've all grown to love and hate) and a digital core that connected wirelessly