Mertloch builds world's longest marble run

Mertloch is attempting to build the world's longest marble run, spanning 3.6 kilometers. Over 350 participants, primarily fathers and children, are using plastic pipes to construct the run, aiming to surpass the current record of approximately 2.8 kilometers set in Switzerland. The event, part of a long-standing father-child initiative, involves meticulous planning and aims to foster community and father-child bonding.