These Curly Whirlies have been knitted in handspun wool. The white one has been handspun with Australian Merino wool. The multi-coloured one was handspun with Australian Corriedale wool.
The pattern that I use is:
Using large needles......
Cast on 150 stitches and knit 1 row.
Next row - Increase in every stitch (300 sts)and knit 1 row.
Next row - Increase in every stitch (600 sts) and knit 1 row.