You are invited to sit at two large tables and make your vision of a future city, using one tonne of white Lego. The models that you make will be modified and expanded by other visitors. You can decide what to keep up or take apart and rebuild.
Eliasson first staged this work in 2004. Unlike normal Lego sets, here there is no branding and no instructions. The bricks are constantly reused while the work is installed. They can be recycled each time the work is shown in a new place.
Olafur Eliasson: In real life is on show in the Blavatnik Building until 5 January 2020.