Yeah I second Hypnoctopus,.. They wrap themselves around anything within reach if they want to....
You also might want to look at the rope section of the local hardware store, you can get braided and twisted rope in a lot of different sizes - you might find a thickness you like better than the Paracord.. I personally would use a braided synthetic - for washability - because sooner or later, it's going to get pooped on.....
But I have seen some nice setups using a really thick twisted sisal rope..
NancyG