This document provides an introduction to 3D printing. It explains that 3D printing works by building an object layer by layer using an additive process. It describes how 3D printers can print detailed designs by bringing ideas to life in 3 dimensions using computer software. Examples of objects that can be 3D printed include Finding Dory figurines, robots, and Slinkys. The document then discusses the important parts of a 3D printer, including the extruder, filament, print bed, and cooling fan. It directs readers to a video that further explains the 3D printing process and includes an activity to label the parts of a 3D printer.