Quoting I like Waffles
Where did you get that lego piece for the eye? Stupendous job, by the way, I love these penguins. ~Waff
It's a few pieces ... The outer eye shape is two 1x4 arch bricks (one upside-down below the other, with tiles to hold it snug). The eye itself is a clear 2x2 radar dish, a black 1x1 round plate, and a white 2x2 radar dish.