Begin by folding each napkin in half diagonally. This will give the napkins a pennant shape perfect for your banner. You can fold them going in either direction. In fact, it is cute to fold in a variety of directions so your napkins show different patterns as ours did.
Next, cut a length of ribbon. This will be the base of your banner.
Take each napkin and fold it over the ribbon so the ribbon rests along the crease. Add a dab of glue then to the inside of each napkin. Press flat and firmly so the napkin is sealed over the ribbon.
Continue this process until you have 5-7 napkins on your ribbon. Be sure the napkins are dry before you attempt to display your banner.