Here is a nice video put out by spoilmykitty.com that shows how a cat tree is assembled. Of course the cats don’t mind, they are already enjoying the structure by the time it is barely out of the box and still in pieces. But, I guess, that’s cats for you!
I like this video because it shows how most assembled cat trees are put together, most of them are pretty easy to do, as demonstrated here.
Oh, and that music? That’s Chet Atkins. Good stuff.