Spinning has exactly a lot of just that in various ways - fast, slow, vertical, horizontal.
Place the marbles at the top and reload them as you desire to keep the sculpture running. You can even release 2 or more marbles to run at the same time (no guarantee against collisions at the bottom).

As this sculpture is hand-made, there will never be another one exactly like it.
 
​13" wide x 13" deep x 24" tall
(33cm x 33cm x 61cm)
 
4 tracks
1" (25mm) glass marbles x 10
Stainless steel track and frame