I’m guessing NGV is the National Gallery of Victoria (NGV), and that the “Lego” is one of the numerous Chinese knock off lego like toys.
You can find some details about Chinese knock off Legos here: http://www.1000steine.com/brickset/miscellaneous/clonebrands.pdf
Download PDF lego-clone-brands
And since I don’t think they had any collection sites inside China for Lego donations, I’m assuming they purchased it.
Soooo, that’s nice I guess. If they really did buy knockoff brands I wonder if they’ll mention it when talking about the finished pieces.
The Ai Weiwei art saga continues.