Here is another cool thing you can build using a 3D printer. This Glow In the Dark Space Invaders Toilet Paper Hanger was 3D printed using eSUN’s Glow in the Dark filament. The model was built in Blender. According to JoOngle, it took under 3 hours to print it using a Flashforge machine. Looks like a fun weekend project if you ask us. More info is available here.