This room was way downstairs and back in a corner.
Although there were long lines for the 'recreated' rooms from past exhibits upstairs one could walk right into this one.
The story here is that everyone was given a sheet of polka dot stickers, various sizes and colors, when we bought our tickets
(actually we weren't but John saw several people who had them and we went back to the desk and asked for ours.)
So I assume that this room had begun as a blank 'canvas' and was brought to life by all of us.
Perhaps this room will be recreated in some future exhibit and at that point there will be long lines to get in.

I've just looked at the small print on our surviving sheet of stickers and discovered that this was called The Obliteration Room.
The internet tells me that: "It was conceived as a project for children, and was first staged at the Queensland Art Gallery in 2002"
There's a time lapse video here of a version at the Tate Gallery in London:
http://www.tate.org.uk/context-comment/video/tateshots-kusamas-obliteration-room