Radiator Marble Run

Mmph! I lined up my heavy hex nut and the brass washer right between the ribbed feet of the warm living room radiator. With an eager muffled grunt, I flicked the shiny chrome ball bearing straight across the floorboards. Clack-clink! It whipped clean through the brass ring, ricocheted off the radiator pipe with a sharp ping, and slammed right into the coiled metal spring wedged against the valve. The whole radiator hummed a cozy, buzzing vibration as the ball bearing rebounded gently straight back into my mittens. Mmmph-rmph! The steady heat toasted my hood while I excitedly set the metal pieces back up for another run. Mmph!