All you'll need for this project is:
1 piece of fabric
Sewing machine (or your meticulous little fingers and a needle with some color-coordinated thread)
1. Find a shirt and turn it inside out.
2. Lay your ribbon down and cut a piece of fabric large enough to cover your ribbon and pin the piece down
3. Sew on the fabric, making 3 large stitches, between the ribbon and on each side.
4. Cinch and tie and you've completed your project!