My cat has a box of cat toys, it’s an old box that held a pair of boots. When I play with her, I only use cat toys, not other things. I also bought her a scratching post...she used to scratch the corner of my couch...so I put the post there to train her to scratch the post. Now, when she wants to scratch, she goes to her post and I’ve since moved it to another location, my couch is safe. And when she wants to play, she will go to her toy box and grab something. I buy her a new toy every few months, they sell them at the grocery store...it then becomes her favorite. I never had to discipline her, I instead re-direct her. To keep her off the table when I’m making dinner, I pull out a chair for her to sit and watch...I show her what I’m doing..let her sniff food, I talk to her. Cats will do stuff to get attention...you must address them immediately. Pick kitten up, and carry her around. Nuzzle her and pet her...then tease her with a toy until kitten focuses on toy instead of other things. Chewing on stuff (not allowed, like cords) is a sign of lack of attention and training...my opinion.