This is an innovative and interesting handheld 3D printer. As shown in the images, the ultra-compact 3D printer pen is shaped like an easy-to-hold pen. Unlike a normal 3D printer pen, the 3D printing pen cannot load any 3D file so your creativity is up to your hand. Drawing various 3D models should be an awesome idea if you like drawing. Apart from that, the 3D printing pen supports ABS filament, and speed of the pen is adjustable.