While 3d printers aren't necessarily complicated they are fun to watch. They are like an inside-out machine. Most machines are hidden in some sort of casing or

While 3d printers aren't necessarily complicated they are fun to watch. They are like an inside-out machine. Most machines are hidden in some sort of casing or under a hood. 3d printers are exposed, so you are able watch the gears spin, belts turn, and the print head extrude.