Sewing with needle winding method: first cut the selected cloth into a circle, and then sew it along the edge of the cut circular cloth with a needle. The sewing method is: thread the needle through the cloth, the needle tip is under the back of the cloth, and it bypasses the upper side of the cloth like winding, and the needle tip passes through the front of the cloth, and so on until the needle passes through the wiring knot for the first time. Don't tighten the thread at this time. Put the PP cotton into the sewn cloth first, and then tighten the thread, and the thread becomes a small ball.

There is also a method of sewing cloth balls, which is more troublesome than this simple and quick method and has a good appearance!