Tate Tanks: Is modern art ready for the granny flash mob? Lacy brought together 430 women over 60-years-old in a shopping centre in Minneapolis in 1987 to discuss their attitude to ageing in a "quilt-like" arrangement of tables and chairs. The Crystal Quilt, that harked back to the art of quilt-making and storytelling, as well as giving voice to a forgotten social group, was one of the first performance based pieces of art to catch the public imagination. The piece has been bought by the Tate and is on display in The Tanks for the next three months. Lacy, 66, also wants to create a new work in the performance space, as part of the Art in Action programme that will run up to October, to celebrate the stories of older women in Britain. She explained that women in the UK today have different issues to discuss, such as access to digital media and activism on environmental problems. She said involving ordinary people often confronts stereotypes. "Flash mobs equate in the popular imagination with youth and spontaneity," she said. That juxtaposition with age is interesting. A series of meetings with NGOs, community groups and ordinary women will develop the work alongside participants. Lacy said the final piece will reflect the concerns of a generation of female "activists and liberationists" who still have something to say. It is all about choreographing something out of the lives and the involvement of people who are not necessarily artists. Email action.lacy@tate.org.uk if you would like to take part.