"There is a great deal of evidence that the road to mastery of any subject is guided by play. Learning a subject by rote can take one only so far. To become a master, the pupil has to go beyond what is known, has to learn what has not been shown by others in the field. Those who study the history of the arts and sciences have many examples of discoveries that came about not through the progression of a planned series of experiments (or at least not a series of experiments that went as planned)."

Stuart Brown