Now that 'The Muppets' has become a certified hit, Kermit, Miss Piggy and the rest of the gang have returned to their pop culture pedestal. While older audiences are wrapping themselves in a nostalgia blanket, young viewers are discovering the jokes of Fozzie Bear and the mistimed stunts of Gonzo the Great for the first time. But for these children just now discovering the Muppets, their experience with the characters and movies will be completely different from the children of the 70s and 80s -- because of the absence of Jim Henson.