SOME OF THEM are only seven years old, and they’re already making Lea Salonga turn her chair on the first note. ‘The Voice Kids Philippines’ is back, and this season has a new coach in the lineup: Megastar Sharon Cuneta, replacing Sarah Geronimo alongside Lea and Bamboo. The show started a month ago, and the blind auditions (where coaches listen with their backs turned and spin their chairs around only if they want the singer on their team) have already turned up a batch of seriously talented kids, a few with near-impeccable technique.