The use of poppets in folk magic goes back to ancient times. Though the material of choice back then was wax, practitioners have adapted through the ages to make poppets out of anything handy; plant material, yarn, and often cloth.
This method of image magic can be used for any number of goals that you can think of, but the poppet is generally used to represent a person; what is done to the poppet is done to the person in sympathetic magic. The inside of the poppet should contain a taglock of the subject of the spell, and can include other items that are involved in the goal (healing herbs, for example), and other stuffing as needed like cotton, wool, or plant materials.
Even if you can’t sew, there is a simple way to make a poppet. You’ll need a handkerchief, bandana, or just a square of fabric, the taglock and other stuffing mentioned above, and a length of string. ( If you don’t have string, rubber bands will work, but the advantage of string is that you can add knot magic to your working.) First, find the center of your cloth. Roll the outer edges toward the center. Now open up a little space in the middle and stuff. Fold over, spread out the poppet’s arms, and tie off the head. (Draw on a face and other details if you like.) Take the end strings and criss-cross in the front and tie in the back, under the arms. While doing so, you can say, “Criss-cross, cloth and moss. This I claim, _____ is your name.” or other words of your choosing, followed by the specifics of your spell.