My one cat is pretty calm but Diago loves plastic bags.. he waits for you to give him one if you are unloading stuff out of them.. then he goes and makes a 'nest' out of it ..poking and prodding and stretching with his paws until its right and then lays in it.. and if misty, the other cat, tries to go look at it he attacks her and then goes back to it. ...even if he leaves it and its still there if she goes to it he runs back to guard. lol