I returned to Maclean Public School in February 2016 to complete two workshops held on consecutive weekends, with the first held on the 13th February 2016. We built a 3D printer! Here is the finished machine. The printer we built is a 3D printer design of the RepRap series of machines, specifically the "Kossel Mini". Rapid Replication (RepRap) machines are the most popular variants of 3D printers. Affordable, highly educational and produced from simple and common components.