Passion/Intrinsic Motivation...The Buzz

Yesterday I found myself reflecting further upon the factors that contribute to learning successes and remembered a discussion I had with Wara earlier this year regarding intrinsic versus extrinsic motivation. As educators we can use extrinsic motivators to encourage students to participate and persist with their learning. However, when a student develops an intrinsic motivation their own engagement in the work being undertaken and desire to persist does not need to be fostered by extrinsic means. When students become intrinsically motivated they become passionate about their learning. Intrinsic motivation is passion.
I see intrinsic motivation develop within my classrooms and often refer to it as a "buzz". When a kid becomes buzzed about their learning they drive their own learning. So the question then (and this is the vein of discussion I have had with Wara) is: how do you manufacture the BUZZ?
The discussion around immersion which Bill has linked back to a previous comment in which he sates: "The desire to master computers must come from within" refers to intrinsic motivation.
Through my observations students become buzzed when the learning is authentic and collaborative. I would like to explore further how to manufacture the buzz OR if it is something we can manufacture at all?