Laying bag flat on work surface, decorate with materials of your choice.
If using washi tape, measure from left to right sides and cut to fit. Do this on the bag and the folded top.
If using stamps and ink, choose stamps of your choice, different colored inks or stamping pens, and mark the bag.
If doing the "dark to light" stamping technique, stamp first at the bottom of the bag and spacing evenly, repeat stamping process without re-inking your stamp. Do the same with the tag. Outline the tag with stamping pens.
If adding the shell, do so with hot glue. Off set to go over the edge of the tag.