Hence, the first mobile portrays flat, black-and-white geometric shapes and reflected light from a glass sphere. Subsequent ones are introduced in ordered sequence: three octahedrons of colored metallic paper, ideally each in a primary color; five Styrofoam balls covered with embroidery thread in gradations of the same color and hung in ascending order from darkest to lightest; stylized paper figures of light metallic colored paper that move with the slightest current of air; and, finally, stylized wooden figures painted in pastel colors.
