1. Tiny piece of fabric, whatever color you want, I picked this because it was the cheapest and ugliest I had i my fabric drawer (never waste nice things) and it sort of matches the coloring of the beads.
2. Obviously some of those hair clip thingies, you'll want to get ones with holes
3. Needle and thread
3. Beads or buttons or whatever you want to sew on
4. For extra hold, some textile glue.
(You don't really need to glue it but it keeps it from sliding and showing the metal.)