yes they do.
poppets work so long as you make them correctly. if you're expecting to throw it across the room and the person goes flying too, no. if you charge a needle, say with anger, and stab them in the knee, then the person will get a shooting pain in their knee until the needles removed. same goes for charging the needle with healing energy.
there's many ways to make them, but it's best if you get something from the person [clothes, hair, blood, a picture...] and place it in or on the doll. it helps charge and personalize it.
i know it's brief, but i only know what i read 10 years ago, you can always look around for more information on them.