George sez, “This looks like the work of the world’s greatest dad: a ceiling level, custom-built kinetic marble run – complete with Instructables info to make your own.”
Kinetic Marble Track Around The Top Of A Room (Instructables)
(Thanks, George!)
George sez, “This looks like the work of the world’s greatest dad: a ceiling level, custom-built kinetic marble run – complete with Instructables info to make your own.”
Kinetic Marble Track Around The Top Of A Room (Instructables)
(Thanks, George!)