Take some hand-dyed roving. (This is from the natural dyeing workshop I participated in, dyed with goldenrod - top - and bindweed.)
Add some other fiber (a darker green wool and some angelina - aka tinsel - in this case) and blend using a blending board (a birthday gift to myself.)
This creates rolags - fat sausages of roving with all the colors mixed together.
Spin the fiber from the rolags.
This results in single ply yarn.
Use a ball winder to wind the single ply yarn into a center-pull ball, then back to the spinning wheel to ply the yarn.
Wind the two-ply yarn on a swift to create a skein.
And - tada! - you have yarn.
What is addicting is the blending of the fibers. After taking a workshop in blending fiber, my interest was piqued until I priced drum carders. Even a pair of hand carders seemed expensive for their limited use. The Ashford blending board is more expensive than hand carders but more functional while being less than a drum carder. Plus I think the blending board will allow for more experimentation.
The only problem with the blending board is, time evaporates while in use. Quite the rabbit hole. I have to be careful when I start because it is nearly impossible to stop.