Go to a fabric store and pick out some of your favorite fabrics.
I just got a quarter of a yard of each fabric and was able to make multiple bows with each one. Cut two strips of the fabric, one larger than the other like this:
I recommend using fabric scissors if you have them. The measurements of each fabric really just depend on how large of a bow you want. I just eyeballed it and played around with it. If you are concerned cut the strips larger. You can always cut them smaller later on. You will also be folding each fabric smaller, which brings me to my next step.
Fold in one side of the fabric, like the picture above, and iron it. Then do the same on the other side. You will do this to both pieces of fabric. Next, you will take the larger strip of fabric and fold both sides in like this:
Then pinch that piece of fabric in the middle...
and wrap the smaller strip around it. You will take a needle and thread and stitch it in place like this:
You could probably also use fabric glue if you don't know how to sew. The last step is easy. Just hot glue your bow to a hair clip, which you can find packs of at basically any craft store.