In the past few years, we have covered plenty of amazing kinetic sculptures here. The Rhombus Rolling Ball Sculpture by Steven Kozari Frank is quite special. It is a wall mounted kinetic ball sculpture with a stainless steel construction and durable black powder coating.
This marble run uses 25mm marbles. It has long, twisty tracks, a double loop, a track that goes around one, and double helical lift mechanism. As the artist explains on Etsy, there are a total of 3 different paths for marbles to take.