<p>The filling material is composed of two hemispheres (1) of paper or papier mache, preferably recycled paper. Both hemispheres have edges (2) which are fixed to each other so that a hollow spherical body is formed. The paper mass includes flat threads. The edges may be joined by glue, folds or mechanical fitting. The external surfaces of the hemispheres may be impregnated with an environmentally harmless substance.</p>
