Improved Ball clock with chime
4:00
A Compact ball clock with chime
15:37
BUILDING A MARBLE CLOCK - Pt.1.
9:56
Ball Clock Review - Video Podcast
3:05
LEGO Ball Clock
3:40
El reloj con BOLAS gravitatorias, una decoración que no te dejará indiferente 
5:47
BOBS Rolling Ball Sculpture
5:54
Quad Marble Machine (2020 repaired)
3:26