The pop landscape is littered with reunion shows that nobody wanted. Were people clamoring to see a reconstituted Creed, or New Kids on the Block? Jump, Little Children’s reunion should be the antithesis of those fiascos. For one thing, fans still love JLC’s melodic blend of acoustic folk and pop. For another, the quintet took hiatus on a high note, after the release of their transcendent 2004 album Between the Dim and the Dark. Their latest, Sparrow, dropped on September 14.