I saw a post on making a yarn ball so I decided to make a twine ball. And it worked perfectly!
You mix Elmers glue and water 50/50 and soak the yarn/string then wrap it around a cheap bouncy ball. I left it to dry about 24 hours. I didn't do it completely correct, I forgot to leave an opening to pull the deflated ball out so I ended up cutting the ball and throwing it away. You can also make a giant one of these and use it for a hanging lamp! So cool.