1. Fold felt into quarters.
2. Tie string around a marker. Hold the end of the string at the central corner of the folded material and use the marker to trace an arch. With the felt still folded, cut along the arch with scissors to create a circle.
3. Use a one-hole punch to make holes around the circumference of the circle.
4. Thread cord through the holes. Knot the ends of the cord to secure.