I made these for my 11 year old cousins. Each one took under 5 mins and I found myself wishing that I wouldn't look ridiculous wearing them.
I picked up a pack of headbands at Target and used a simple bow and flower pattern. I happened to have the yarn that matched the colors really well.
In the bow, I wrapped it together and around the headband at the same time.
In the flower I added the button and used that to affix it to the headband.
I used 4ply yarn and my trusty G hook.
I'm happy to say the girls seemed to love them.