How old? He looks to me about 8 mos to 18 mos. But if he just discovered counter tops, he must be on the younger end of that range. And now the fun begins! If he can scale counters, why not go higher? The fridge top could be next! And that shot with the opening into the next room with the box of tissues on the ledge - that means that is another great route for dashing, racing and zipping around. I had an opening like that in my apartment; Amber and Sparkle used it regularly. Always a different cat in front. He is really strutting in the first shot, so proud of himself, ha ha.

Of course, YOU did what any good cat owner would do - ran and got the camera! Other folks would ask, "why didn't you tell him to get DOWN!"