This video is a great introduction on how 3D printers work, but it is just a quick video with no additional resources or activities. To explain the extrusion process of the printer the video relates it to a layered cake to help students gain a visual of the concept and presents other materials that scientist have used in a 3D printer. For a hands-on exploration to get a similar idea of the print process; if students have Lego at home students can try to build a model by layering the bricks from the bottom up similar to a 3D printer.