All different kinds of ribbon cut about 2 inches long
toy rings (optional)
button snaps (optional)
First, pre-wash the fabric you decide to use. Don't tell anyone but I never pre-wash. I know, I know, those are the rules but I don't like that rule and I have not had a problem yet...
Fold your ribbons in half and pin them on the bottom fabric all the way around. I like to put my ribbon in a pattern so the whole thing matches. Either way works.
Now sew a single stitch around the entire square close to the edge.