Here's what I used:
bakers twine in various colors
All of the supplies I had on hand, left over from other projects. So, while I watched the Today show, I just started wrapping the balls.
The only time I used the hot glue was at the end, when I just glued down the tail of the twine.
After using up all my twine, I went to fill the jar. I had some other smaller balls as well that I used to fill it up too.
Of course these will probably be swapped out in a month for pumpkins or gourds!