My husband, Jay, and I have a new family member—a 2-month-old tabby cat named Jasper. To keep our new kitten safe, we’ve had to break some old habits, like leaving doors open. But one thing remains a challenge: the open stairway. Cats like to climb. Even as kittens, they know that the world looks better when you’re looking down on it. So whenever I have Jasper downstairs with me, she is determined to go upstairs. Trying to keep her confined to a safe place near me has tested my ingenuity. Gates that work with children and dogs do not work…