Difficulty: Difficult 3D pen creation of dragon by Geeetech TG-21 3D printing pen. • Geeetech TG-21: https://www.geeetech.com/tg21-diy-3d-printing-pen-white-p-1152.html • Red PLA: https://www.geeetech.com/3d-printer-supplies-filament-reprap-pla-1kgroll-red-p-976.html