What could a "yangban" (양반) make with a 3D pen?

ANSWER: He could make a yangban hat (갓) and a bow (활), which would be handy if he came across any cucumber (오이) zombies.

I like the guy's commentary in the following video.

"뒤집어주면 놀랍게도 똑같습니다."
"Surprisingly, if you turn it over, it is exactly the same."