Punch holes around the perimeter of the plates- at most 2 inches apart, or closer for the maximum amount of bells.
Take the yarn and weave it up through a hole, around the outside and back up the same hole again and tie a knot to secure the plates together.
String a jingle bell through the yarn and continue weaving your plate. Alternate your jingle bells every other hole or more, depending on how many bells you have.
When you get back to the hole in which you started, tie off your yarn.