Marbles, Magnets, and Music (Synchronized) - YouTube
▻https://www.youtube.com/watch?v=GCTyFp0PpHE
I’ve taken the piece “Waltz of the Flowers” by Tchaikovsky, and synchronized it to a chain reaction marble run by hand. After listening to parts of this song hundreds of times to match things up I went a bit crazy.
… tu m’étonnes !