{{{Aims}}}
One of cats will eat tie line, shoe straps, elastic hairbands...
Yikes, that can get expensive. One of my cats once ate 40 inches of 1/4" ribbon. Thankfully, they were able to clip most of it and surgery was not required for the rest.
My other cat likes to chew on cardboard, paper, metal, elastic, plastic, etc. Sometimes I'll put her food out for her and 30 seconds later find her chewing on some non-food substance. Her favorite is chewing on plastic bags at 2 in the morning.