A bear with a prominent grease spot on his little beige nose spends his days wedged behind the bumper guard of an ironworker's pickup in the Gowanus section of Brooklyn. A fuzzy rabbit and a clown, garroted by a bungee cord, slump from the front of a Dodge van in Park Slope. Stewie, the evil baby from "Family Guy," scowls from the grille of a Pepperidge Farm delivery truck in Brooklyn Heights, mold occasionally sprouting from his forehead. All are soldiers in the tattered, scattered army of the stuffed: mostly discarded toys plucked from the trash and given new if...