Lee Hayde, CSTANJ Treasure shared his stundents work. 
This extensive roller coaster complex was designed, built, and wired by a student at Roxbury High School.   It was created from the parts contained in 7 individual Knexroller roller coaster kits, all linked together to make one large circuit.   The ordinarily battery-powered motors were wired in parallel so that all motors are powered by a single USB connection.