From days of nursery fires, mustard plasters, codliver oil, cops on horseback, and red nail polish meant too much vanity. Melendy children know their vocations. Mona, 13, actress-to-be, recites poetry and Shakespeare at the drop of a hat. Engineer Rush, 12, builds Meccano bridges. Miranda, 10, dances and paints pictures. Oliver, 6, calm and thought…
