Marble Night City Marble Run LGA01 by ROKR. This wooden puzzle designed by Robotime is a fun puzzle that fully works once completed. Marble Night City comes with everything you need to fully assemble the puzzle and use it when done. It comes with 10 steel ball bearings that when you turn the handle of the gear they begin to traverse the marble run. Depending on location each marble follows a specific path. In one section two marbles need to run down the section before the third can pass through and release the other marbles. Marble night city marble run is fun to put together and interesting to run the marble when it’s all together. Be careful as all the pieces of the puzzle are thin and delicate wood.