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Cut out two cardboard circles and then cut out a wedge and a small hole in the middle of each circle so that your disks look like they have keyholes. Remember, the bigger the circles, the bigger your pom pom will be (and vice versa). You can cut out a circle freehand or you can use a bowl or glass as a guide to trace the area you want to cut and then cut out the circle. You can now use your finish pom pom by attaching it to a knitting or crochet project. Use the yarn tails to attach it to a hat, scarf, sweater, or whatever you want.

Summary:
Cut out two cardboard circles. Use your finished pom pom.