Not sure Renzo Piano and Steven Holl have been getting it right? Here’s your chance to make your mark on one of their buildings. In an exhibit on New York’s highline, artist Olafur Eliasson invited architects from 10 select firms to contribute a design in all white Lego blocks, which viewers are free to modify or tear apart. This installation called The Collectivity Project, part of the group exhibition Panorama put on by the Friends of the High Line, is meant to “provide a compelling counterpoint to the concrete-and-steel towers that form the project's backdrop.” The show is open to the public daily from 10am to 7pm until 30 September 2015.