Friday evening at the 2006 New Jersey State Fair is a swirl of colors, aromas, and sounds. By the time the fair ends on Aug. 13, more than a quarter-million people will have trod the grounds in Augusta; gorged on food both fast and exotic; sampled home-baked breads and jams and cakes; applauded racing pigs and showy horses; petted baby rabbits and donkeys; and gotten teary-eyed over nostalgic jazz. As someone said, at the fair there’s something timeless, something essentially American, something forever young that takes you back to the fair’s roots in 1821.