The spoked wheels are made by mounting a rim and a hub into a special fixture supplied in the kit, then winding black nylon "thread" around the rim and hub in a specific pattern. It took me about 7-8 tries before I finally got the winding pattern down in my mind. Once you have the sequence memorized, it's actually pretty easy, and wheels 2 through 5 went a lot faster and easier than wheel 1. The hardest part (once you get that winding sequence clear in your head) is manipulating the fixture/rim and flipping it over and side to side with one hand while winding the thread and holding the spool in the other hand, and all the while keeping the thread under constant tension as you go, so that the "spokes" are nice and tight and straight, and not loose or saggy. It's not easy to do. Building the wheels is by far the hardest part of building this kit. Here is the basic setup... you put a rim and a hub into the two-piece fixture and screw the halves together, then begin to wind the thread around the rim...
Once you finish winding the rim, you tie off the thread, then glue on a second, back side rim and wind the "spokes" around that one. But the winding pattern is much simpler, plus the hub is already being held centered in the wheel by the "spokes" from winding the first rim, so the fixture isn't needed to wind the "back side" spokes. Here you can see that back side rim before I wound the thread around it, and also the separate outer and inner "finishing rims" that get glued to the outside and inside of the wheel and hide the thread winding around the rim...
Here you can see that "finishing rim" in place, and how it finishes off the face of the wheel...