A poppet or "voodoo" doll (they have no real connection to Vodou)can be made from anything. You could make one out of cut paper if you really wanted to.
Just a fore-warning, in case you aren't aware - voodoo dolls don't work the way they do in the movies. They don't allow to control someone's actions or thoughts by stabbing them, or twitching their arm. Though, they have been used to help influence them with certain entities, people, etc. Kind of like planting a seed in hopes it will grow, you plant an idea/notion and hope it becomes a desired result.