Think, Think Thingamajig; what do you represent? is a performative sculpture work by the Glasgow-based artists Joanne Tatham and Tom O'Sullivan. The Think Thingamajig is a cube decorated with pink diamonds painted on black, a design that has existed as the cover for a script and a ceramic sculpture in their practice previously. In this outing it has become a cuboid costume worn by a silent man who sits slightly forelornly in his own world as a poignant living sculpture in the Tate gallery. Also on view is a second chance to see Sue Tompkins doing her spoken word performance, this time a new work called 'Grease' 2006, written and performed especially for Tate's innovative Art Now programme of contemporary art, which presented both these works.