There’s an installation there at the moment called The cubic structural evolution project . It consists of a 12m long bench piled high with white lego blocks with the implicit invitation that visitors take a seat and get creating. Rhana Devenport, the director of Auckland Art Gallery Toi o Tamaki explains that
The cubic structural evolution project comments on community decision-making and urbanism, and explores the relationship between maker, spectator and object. The project is as relevant to town planners, civil engineers and architects, as it is to families.’
More information about the installation here. It’s due to run until the 1st of March 2015 and entry is free. There is a sense of community building side by side with strangers and appreciating the sometimes very impressive works that previous visitors have left for posterity. The use of exclusively white blocks also put me in the mind of a cloud city, particularly since the installation (on the second story mezzanine) can be seen from the streetside stairs outside the building.
I misunderstood the project at the time so got particularly unimaginative.