Marble Run with Lap Timer

Hi everyone! This is my first model uploaded to MakerWorld, so please be patient with any potential issues. 😊 I got my Bambu Lab P1S a few weeks ago, and I’ve been absolutely thrilled with it—it’s a life-changer! My original plan was to design a marble sensor/detector to track lap times, but the project spiraled into something much bigger. I ran out of time and had to publish this at the last minute (I only discovered the “Master Challenge: Marble Run” contest recently). At home, we’re 2 kids and 2 “big kids,” and we love competing at almost everything. Naturally, if I made a marble run, it had to track who’s the fastest racer. Assemble it and give it a shot—can you break the 20-second barrier? The box is optional; you can print it and add the lap timer, or simply play for fun without tracking times. The marbles used are 16mm glass ones, but if you don’t have any, I’ve included a printable file for marbles. To-Do List (Coming Soon!) Let me know in the comments which of these features