The architecture of flow

Nowadays many people argue that learning must be fun, but what does that mean and how can it be achieved? The fun involved in learning can surely not be like the kind of shortterm 'kick' one gets from going down a roller coaster. Although this gives instant pleasure (at least to some people), true learning requires a more sustained, long-term motivational force that stimulates the learner to keep seeking new challenges and gets her through periods where the going is tough.