As a pet lifestyle expert, I’m often asked the question, “What do cats want?” The answer is simple: A fun outlet for their instinctive needs to scratch and climb. Unfortunately, most commercial pet playgrounds consist of towers (aka “cat condos”) and scratching posts swathed in hideous nylon broadloom. If you dread displaying these eyesores at home, you can now make your very own Catnip Castle. Easy to craft out of corrugated cardboard, it mounts to the wall, niftily saving room in small spaces. While the Castle’s sculptural lines are aesthetically appealing, it also works as furniture insurance, keeping Kitty’s claws gainfully occupied.