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Each seed has been individually made by craftspeople in the Chinese city of Jingdezhen, which is famed for its production of Imperial porcelain. “It looks simple but it takes some skill to make,” explained Weiwei.
Sunflower seeds have a special significance for the artist, who remembers the sharing of seeds as a gesture of friendship during the Cultural Revolution (1966-76).
You can record a video message for Weiwei in a booth beside the installation. The videos will be published on the Tate Modern website, and the artist will respond to one each week. You can also join the conversation via Twitter, where Weiwei will reply to tweets with the hashtag #tateaww.
The Unilever Series: Ai Weiwei is at Tate Modern until 2 May 2011. Entry is free