It's 40 years since the Hayward Gallery opened on London's South Bank, and to mark the occasion, it has put together an exhibition as playful as jelly and ice-cream. Called Psycho Buildings, it's a clamorous, silly and sometimes startling collection of sculptures devoted to architecture.
Up on the roof floats a giant transparent beachball; stick your hand in a lucky-dip and you might win the chance to bounce on its squashy surface. Around the corner, Austrian group Gelitin have built a fourth-floor boating lake. If you're brave, you can scull straight towards the edge of the building and the London Eye beyond.
Downstairs, each gallery offers a different mood. One is gored and smashed by some giant beast (or artist Mike Nelson with a chainsaw); another (courtesy of Michael Beutler) is covered in chicken-wire and multi-coloured tissue paper; Ernesto Neto's strange phallic tent smells, unsettlingly, of cloves.
Yet for all the fun and games of the upstairs galleries, it's the final and quietest room which leaves the greatest impression. Called simply Place, it is Rachel Whiteread's collection of nearly 200 second-hand dolls' houses lit from within, each glowing with suggestion, absence and mystery. Psycho Buildingsis at the Hayward Gallery until August 25th. Tickets £10. www.haywardgallery.org.uk.
Louise East