Piezas de funcionamiento de mármol Gravitrax - 18 pistas - 3 x largas, 6 x medianas + 9 x cortas - en muy buena condición
An extra set will double the the quantity included in the standard Gravitrax Starter Set. Gravitrax Marble Run. I enjoy the building of Gravitrax which I regard as the best marble run product ever and I am well into my 70's.