While North doesn't show much interest in the closed window (unless we're feeding the birds), whenever I have it cracked just the teensiest bit, he loves to put his paws up and sniff that fresh air coming in. Now my window ledges weren't in the greatest shape when we moved in but, if I owned my home, I would consider getting one of these Sill Shields to match any window I'd have open.
Made from heavy duty, outdoor grade PVC, these attachable shields protect the surface beneath them, while still hiding the scratches better than painted wood. With three sizes of depths and three for widths, they're designed to fit most windows – and, starting at $12.95, totally affordable too. To see another piccy of my lil guy trying to get a good view from our top floor apt when you read more.