MOC of an Oil Field Pump Jack. I have always been fascinated by these machines, during trips through West Texas. As a result, I decided to create my own LEGO Rendering. I believe that this would make a great LEGO Set because the design is simple yet interesting. It’s relatively inexpensive. It can also be a Great Starter set for classrooms or anyone looking to get into LEGO Technic or STEM. Build a set like this and The LEGO Addiction Bug has bitten you!