My cats love to weave in and out of my vertical blinds too. Sometimes they knock out the bottom weights on it too. When it's warm out, I like to open up my sliding glass door. Storm likes to put his claws in the screen door and open it up to go outside on the balcony. He's done some damage but not enough to have it replaced. My cats also love to claw my couch and recliner. They have two scratching posts but I guess that's not enough for them. My cat Sunny loves to go swimming in his water dish. Some weeks he does it daily and then he'll stop. When I think he's finally stopped this behavior, he'll start up again. Pepper will play in the water also but not as much. Sunny will also play in the toilet so I have to be sure that the lid is always down. Oh well, cats you gotta love them.