We just see that he has not yet learned to ride the bike correctly. Once the boy learns to ride the bike, the change that occurs is not in his legs or arms or in the hardware at all. The change that takes place is in the software in the brain. Vision is normally acquired through life experiences. To develop a well-functioning, efficient visual process capable of meeting a myriad of demands requires the individual to have had many, many different developmental opportunities throughout his or her life.
Elite athletes are excellent examples.
The difference between the average athlete and the elite athlete most often is the difference in their visual abilities. Sports superstars frequently report that the ball seems to look larger or move slower to them. This is because their excellent visual process derives meaning from the environment so rapidly and efficiently that events seem to unfold in slow motion for that individual. Thus, their performance is increased well beyond the abilities of those around them and they become recognized as superstars. As with the child learning to ride the bicycle, the differences in the athletes are not in the hardware.