Assemble one of the most complex mechanisms ever fitted to a model. The upwards movement of marbles up the track is powered by one single motor which. via a network of gears and rods. allows for 3-axis movement of the conveyor. 

The pre loading of the marbles is done via a staircase-style mechanism. powered by the same motor. Once assembled you'll get lost for hours in the complexity of it all. a mesmerising dance of gears. cogs & rods. 

Once all marbles make it through simply dump them back into the starting position and get lost in the movement all over again!