The intervention is involved in two diametrically different spheres of control. First, a tectonic manipulation of a solid, mineral object, where the indeterminate podium is dominated by a series of subtractions from its own mass. With two main characteristics in its geology: formal impertinence and the language of austerity conferred by the concrete texture. Thus, from cavities and depressions, a series of areas of action and appropriation by the user are configured, which will have the possibility of inferring meaning to the final form open; grandstand, tunnel, refuge, amphitheater. Children and Mothers, all or none at the same time.