How to Build Marble Run EXTREME Set, Marble Genius. Come and see how the Marble Genius Marble Run Extreme Set is built and be entertained by how the marbles run down. While this is the Extreme Set, the building techniques can apply to any of the other sets by Marble Genius, such as the Starter Set and Super Set. Subscribe for more fun videos: http://bit.ly/2WU66n0 #marblerun #howtobuild #howtobuildmarblerun