Component object their own center points

The right and left wings of a penguin object are themselves objects

It is possible to animate a penguin causing it to flap its wings independently of one another. 

Can do by rotating each wing around one of its axes.

Must locate the center point for each wing.

Must know what constitutes front, right, and up from the viewpoint of the wing.

Must know the directions of the red, green, and blue axes relative to the center point of the wing.