In the current issue of Edutopia, Clesse discusses creativity and delves into the question of what makes people "creative". He found some research showing that it may come from play rather than work.
He [researcher Donald W. MacKinnon] had examined what made people creative, and he found that the professionals rated "most creative" by their colleagues displayed two characteristics: They had a greater facility for play, meaning they would contemplate and play with a problem out of real curiosity, not because they had to, and they were prepared to ponder the problem for much longer before resolving it. The more creative professionals had a "childish capacity" for play — childish in the sense of the total, timeless absorption that children achieve when they’re intrigued.
As he notes, this is quite the opposite of the way business – and I would add education – works in the 21st century. Read the whole essay for some insight from someone who was probably a very unorthodox educator.