Hi Striker,
Like you, I love to sit in the window and see what's happening in my neighborhood. But it seems your ledge might be a bit uncomfortable for a kitty. You might want to talk to your Meowmie about one of those window things they have in PetSmart. They attach to the ledge and some even have a nice warm, comfortable cushion where you can take a nap in the sunbeams.

Your friend,
Groucho