Re: As someone who currently designs chip-enabled cat interface devices...
Climb a Ladder! That's Nothing!
When I got two kittens many moons ago, I would occasionally put them outside to get used to it.
Occasionally I would look out the window to check on them and one or both would often be a considerable distance up the outside wall of the house to my second floor 'office' window using nothing but razor sharp claws on ridged house brick for traction.
Amazing to watch.