This is really a wonderful Illusion, originally invented by Jerry Andrus. This little dragon is made out of paper – simply print it, cut it out, stick it together, and stand it on a table or shelf. When you move around, the dragon’s head seems to follow you around the room (if you stare at it’s eyes).

Then i make them in real 3D, i mean 3D illusion in 3D space XD.

Picture taken from https://www.moillusions.com/dragon-illusion