Tear old rags into inch-wide strips. Knot the ends of the strips together. Ask someone to help you start winding the long strip of rags into a ball. Stuff the ball into the toe of an old sock, knot the end of the stock near the stuffing, and fold the extra back over the ball. That way, the bag will stand up all by itself.
Ball games can be hard for young children, especially at first.
Besides that, when you encourage the use of ordinary household things for games, you're helping your child become inventive, creative and resourceful by finding new uses for things.