What are constraints? (And why are they essential for learning?)

“So many witnesses observed the utter freedom of his flights of thought, yet when Feynman talked about his own methods he emphasized not freedom but constraints.”

              -James Gleick (in reference to Richard Feynman’s use of constraints in physics)

Watch this video to see a highly imaginative use of constraints applied to the game of basketball (Apparently the Belgians are not only innovators in the world of soccer!)