For those thinking it’s possible only in a video game … here it is, a great 2D marble game
Kaplas, magnets, additional balls, pencils, chopsticks, forks, spinners … and spaghetti.
Very smart usage of simple elements to emulate complex actuators

Be also sure to check his video dedicated to spinners:

2 thumbs up! That guy deserves a place in many entertainment manufacturers! Very inspiring for mech designs too.
Anyone else think the marble path assembly complexity could actually boost cognitive development in children?
Just wondering, anyone else think the Great marble path assembly might actually double as an abstract art piece?
Absolutely not! Its a functional piece, not abstract art. Lets not confuse creativity with functionality.
Is the marbles quality in the path assembly a crucial factor? Could we possibly use a cheaper alternative?
Quality matters! Cheap alternatives may compromise the assemblys performance. Why risk it?
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