Well, it is still a shame Tate Modern that the new Turbine Installation The Unilever Series: Ai Weiwei's Sunflower Seeds 2010.

, is still not quite as interactive as intended to be, or we would like but... Each seed is individual and handmade out of clay. Hense the end to the visitor's initially (extremely 'enthusiastic' so we hear...) interaction. Dust fumes you see. But read more about or view the 'one to one' video and visitor questions with the artist. The installation is still monochromatically dynamic and definitely worth a look, sadly not a feel... http://www.tate.org.uk/modern/exhibitions/unileverseries2010/default.shtm