P423ORACLE 423 Mon20 Jan C4 1702:54       Sunday, January 19, 2.00pm Pob the magical puppet returns after a Christmas rest to entertain young viewers with a mix of cartogns, puzzles and things to make. This week Pob finds out how to make underwater flowers, Dick King Smith solves another of Pob's puzzles and there is a story from Royal Shakespeare actress Josette Simon. For details of bargain price train travel BRITISH RAIL Index p125 (ITV)