The kitten, Barubarossa (Baru-chang), has become accustomed to my home and has become able to move in three dimensions. When that happens, I want to introduce a cat tower as something I wanted to try.
I chose a smaller size because it is still a kitten. It is possible that Baru may not be interested in the cat tower. I posted the assembly of the cat tower and the situation after that on YouTube, so please take a look.