I made this marble roller coaster with wood and poly tubing for the tracks. It took me about 2 weeks, doing 15min. a day and it was also for my science project. The part that the other marble started rolling was, because the other one hit the metal pole and the metal pole hit the other marble at the top and made it roll.
@bannerv I used wires
Th3gunn3r22 1 month ago
what did you use to keep the track together!? plz tell me as soon as possible
bannerv 2 months ago