First, cut two large circles from the same color card stock. Cut a slit in each circle that extends just a little past the center.
Join the two circles by sliding the two slits together. If the circles don't line up once combined, simply cut the slit a little longer until they do.
With the circles combined and laying flat on the work surface, use a glue stick to apply a strip of glue along one of the slits.
Cut a piece of string about 36-inches long and press one end of that string into the glue.
Next use the glue stick to attach a medium circle to the large circle, covering the string.
Now glue a small black circle in the center of the medium white circle.
Glue the mouth of your choice under the eye.
Now you will need to crease the fold on the face you just created, making sure the paper eye and mouth stay in place.
Finish the monster by repeating the above steps for the remaining three sections.
Hang your monsters so that they alternate in height. If they are right next to each other they are likely to tangle. Varying the heights eliminates that problem!