Cut a circle from the backing sheet approximately 1"-2" larger than the hole in the cardboard roll. Attach the plastic to the end of the roll with a rubber band. You can help the plastic fit around the roll by making small cuts around the plastic. Repeat with the second roll..
Cover each roll with a piece of decorative paper; secure with clear tape.
At the bottom end (not covered with plastic) of each roll, make two holes facing each other. Align the holes and secure the rolls together with a rubber band (Image 1). Cut a piece of string, twine, or string and tie the ends through the holes on the outer edges, creating a neck strap (Image 2). Tie a smaller piece of string, twine, or string through the two inner holes to secure the rolls together.