This wonderful store with the awkward name (most patrons just call it "Piggy" and leave it at that) has the funkiest, hippest collection of clothes for the preschool and grade-school set. Grown women have been heard requesting some of the more fashion-forward girls' items in grown-up sizes, but the real test of a kids' clothing store is what it's got for boys. And "Piggy" delivers: no drippy Little Lord Fauntleroy getups in sight, no precious Mama's boy ensembles that only a grandmother would love (or buy). The store's buyers have clearly scoured the market for the most colorful, imaginative and coolest duds for bothsexes. A big bonus for beleaguered parents dragging around uncooperative offspring is the bounty of toys the store also sells, and the cozy playroom where kids can sample these wares -- not to mention the cheery staffers who don't seem to mind restoring order to the occasional toy explosion.