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The making of a voodoo doll is a very personal thing. Spanish moss is almost always used, but if you do not have it on hand and feel that yarn would be a better personal substitute to suit your needs of the doll; then go ahead and use yarn.
nope
A doll usually made of rags. Most rag dolls have yarn hair as well.
You need to get any sort of fabric or yarn to knit trace the doll's body any part you will need to sew the fabric together now your doll has a cute outfit
Well, they used really old machines and spun it. Sort of like yarn
I'm pretty sure they make the yarn with wool
Straighten it...you cant make a quilt if your yarn is in tangles
crochet or knit a swatch then wet with water thoroughly set for 3 - 8 days carefully undo the swatch then attach hair to amigurumi or doll
You can't. (unless you are pretending it's yarn and are rolling it up.)
String, it is stronger than yarn is.
Similar to the process for making cotton yarn-see weblink