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If you're in Brisbane Australia you should head on over to the Gallery of Modern Art in Brisbane and check out Yayoi Kusama's exhibit Look Now, See Forever. I especially love the above installation, The Obliteration Room:
"a brilliantly white environment (a blank canvas) where over the course of two weeks children who visited were given thousands of coloured dot stickers and were invited to collaborate in the transformation of the space. "
So awesome right?
I would have totally freaked out as a kid. Actually, the thought of unlimited stickers still makes me a bit giddy.