Leslie Edelman has run Tiny Doll House, a miniature figurine shop in New York's Upper East Side neighborhood, for 35 years. Eighteen months ago, new clientele started routinely coming to the store, he says. In addition to Edelman's regulars — parents, grandparents and collectors — groups of 20-somethings now flock to the store on Saturday afternoons. They giggle among themselves, text furiously and buy tiny Labubu keychains, Pez dispensers and mock Eames chairs. Some tell Edelman, "I've seen