This project might look VERY familiar to many of you b/c it was originally a hair bow from my hair bow class. I took the exact same project and just hot glued it to a piece of ribbon and tied it around the napkins. I didn't have any old toilet paper cardboard pieces, but I have seen them used too. So, here is what I did and you can click here to be taken to my video tutorial on how to make this fun flower.
Spice Cake Designer Fabric
Big Shot, fun flowers die
paper piercing tool
You can't see the ribbon that is tied around the napkin...trust me it's there :) I just tied a loose knot under the napkin.