JULY 17-28 HIROSHIMA AND NAGASAKI: THEN AND NOW Exhibition at Quaker Gallery, 52 St Martin's Lane, London WC2, of photographs and young people's anti-war writing to mark the 50th anniversary of the destruction of the two Japanese cities. Organised in conjunction with the Hiroshima-Nagasaki schools' anti-war writing competition. Details: Richard Woolfenden, 0374 923017 (mobile).
JULY 24-27 AND AUGUST 30-SEPTEMBER 1 DESIGN DETECTIVES A one-hour activity for children aged five and over at the Design Museum, Shad Thames, London SE1 to keep them occupied while their parents explore the Frank Lloyd Wright exhibition. Visitors can also design Frank Lloyd Wright bricks made of plaster of paris, of which some will be used for building a wall at the museum. Details: Lesley Butterworth, 0171 403 6933.