You can make them in cloth, clay or whatever. Instructions you can find everywhere on the internet. The important thing is to make them as similar as possible like the person you want to represent. Also while making it you have to "bless" the doll with the name of the person, and then speaking to it like you're speaking to the person. You can also use herbs, crystals which correspond to your intent (charge them first if you use it) . ALSO symphatetic magic (like every other form of magic) it's not "voodoo". The origins of dolls and effigies for healing or hexing others are in greek and roman culture (also egypt) , you cant find them in traditional voodoo.