Giant Gravitrax Marble Run
gravitrax | marbles | April 20, 2021
Gravitrax marble tracks look like fun, but you’d need to invest a lot of money to build something as impressive as the course that Jelle’s Marble Runs put together. They divided the track into four distinct areas, from soothing single-marble action to a cacophonous 1000-marble avalanche. It must have taken days to set this all up.