For Costume Players, please attach your Android on your eye. You seems as MS-06F ZAKU2.
This eye changes smile eye and Rolling eye.
If you see up, Monoeye changes smile eye with vibration.
If you see down, Monoeye changes rolling eye with vibration.
This eye moves right and left.
If you lean your head to right, Monoeye moves right with sound.
If you lean your head to left, Monoeye moves left with sound.
Vibration and Sound help you, because you can't see your Android screen while your Android is on your eye.