The duck has complicated structures inside the cute outside, I think sometimes we forget we are only making erasers, just toys, not airplanes or spaceships. This is a good example of BEAUTY IS MORE THAN SKIN DEEP, the design is not just about the outside or how cute it is, substantial thoughts and work were devoted to the internal structure of this duck, something few people will see or notice, and have no effect nor needed for the outside beauty, it is all about perfection and drive for excellence, steps beyond what is required and what we thought we could achieve. Whther no one ever notice it nor appreciate it is not relevant.