This one might by my largest hand-released RBS I’ve built. For every press of the lever one or more balls are released onto the tracks for their trip down to the bottom. With three tracks this one has plenty to watch. And you get to choose how many balls are on the tracks. Let just one go or let them all go! The loop d’ loop has 9 inversions! There are several large dips in the tracks, a ball collector, small dips in the tracks, and a large spiral at the bottom where all three tracks collect and spin around before dropping through and lining up so you can place them back at the top.
100% stainless steel, TIG welded.
Rolling ball sculpture AKA:
Marble machine. Ball Run. Ball Roller coaster. Ball machine. Marble roller coaster. Rolling ball machine. Rolling ball structure. Marble run art. Kinetic marble sculpture. Custom marble run.