There's a Lego map of the world being built on the South Bank; and a maze of books in the Royal Festival Hall. The usual overpriced theatre bars are supplemented by an outdoor food market (different foods every day) and a host of temporary eateries in converted shipping containers. There's a beach dyed in rainbow colours, roof gardens, and a basement full of inclusive art including old desks, a photo machine and a bored man who will make you an imaginary world passport. It all has a bit of the feel of the next; the room for London was stuffed with books, too -- factuals about art and towerblocks nestling against suitable authors like Ballard and Self. As well as checking out the hatwalk, we also went to art of the unseen (which featured two very different air conditioned white rooms and an invisible maze negotiated by wearing a vibrating headpiece) as it was included in the price, along with lots of other places (members' bars, etc.) but we grudged any time not spent in the boat.