This is an installation at Tate St Ives by Rivane Neuenschwander called I wish your wish. It is a room full of ribbons with wishes printed on them. The wishes- 60 in all came from the people in St Ives. The idea is for visitors to take a ribbon and tie it to their wrists, when the ribbon falls off the wish is granted. When you take a ribbon you replace it with your own wish and so it is self feeding (as she describes it). We had a tour of the Tate and enjoyed it more with better insight and background to the work. It closes now until next summer as they are building an extension deep in the bedrock.