https://www.instructables.com/A-Wooden-Marble-Run-in-a-Frame/
https://woodgears.ca/marbles/build.html
MARBLE FLYER RACE TRACK - Wood & Metal Roller Run with Glass Marbles
https://www.woodmagazine.com/marble-run-downloadable-plan
https://www.instructables.com/A-Wooden-Marble-Run-in-a-Frame/
https://woodgears.ca/marbles/build.html
MARBLE FLYER RACE TRACK - Wood & Metal Roller Run with Glass Marbles
https://www.woodmagazine.com/marble-run-downloadable-plan
Absolutely gorgeous table in the lobby at the hotel in Helsinki.
The table was 15 shoe length long. I wear a size 12 Nikes. I assume that’s about 5 m.