Mine only on occasion shred the toalett-paper(Vinnie 2yrs)but nothing else.
I don't think there is any use getting a"chew-toy"for a cat,they do not chew.
The three of them have a fresh cat-nip patch growing in my backyard and they'll chew on that,but only for a while
Why do cats do the things they do? Well,it's a mystery,but that's why we love them,right
Like Lucky said,give her her own newspaper to shred