Don't miss Sunday's open day at the National Concert Hall - the events kick off with a parade through Grafton Street and Stephen's Green to the hall, led by the Tallaght Festival Band. The President, Mrs McAleese, will then open the event, and from 1.30 on the place will resound to the sound of music of all kinds . . . This evening, between 6 p.m. and 8 p.m., the Temple Bar Gallery will be giving art away - you can choose a piece from the international Mail Art exhibition to bring home . . . The Northside Arts and Cultural Centre is running a new film and TV production course for disabled people - contact 01-8320995 for details . . . Go along to Andrews Lane at 1 p.m. on Saturday and pay what you can, from 1p upwards, to see the wonderful Barabbas production of The Whiteheaded Boy . . .