You need small plates of left-over thin wood, plywood or hard cardboard. Get them cut at a building supply store and have them punch two holes on one side.
Find designed paper napkins that you like and cut them into the size of the plates. Carefully unfold the printed ply. Apply paper-napkin glue to a plate and cover it carefully with a printed ply. Apply another layer of glue on top. Leave to dry.
Thread a ribbon through the holes.