it works well with a "plain" yarn - solid or semi-solid. Handspun can work, as could a gradual gradient
yarn. Some variegated yarns will also work nicely. It\'s probably best to avoid yarns with obvious stripes.
A circular needle (max. 80cm/30" long for a single loop) - if the needle is not too long, you\'ll get a
nice flow as you knit.
One stitch marker (you can just use a yarn loop in a contrasting colour).