Hot glue gun becomes handheld 3D printer with some help from Lego

Vimal Patel has shared his Lego extruder design on Redbrickable Given some biodegradable 3D printing filament and tasked with doing something creative with it, Vimal Patel built an extruder using Lego, attached it to a rather ordinary hot glue gun and ended up with a pretty funky 3D printing pen...
Hot glue gun becomes handheld 3D printer with some help from Lego