My first thought about passion was that it is contagious.
To give you an example... I've been always more of a techie, but when I heard of the Hardcore History podcast and tried listening to an episode I just kept on listening. Because - even though history didn't interest me much before - it was presented with such passion and quality that I really enjoyed it. (kudos to Dan Carlin)
Let me share my experience hosting a creative learning workshop called the City X Project.
This is really a workshop in design thinking and at the same time an introduction to 3D printing - therefore I ran this workshop in a local makerlab.
The idea about teaching design thinking is to present a design challenge to the kids and then lead them through the steps of the design thinking process: empathize, define, brainstorm, prototype and test.
I find this very useful, as a basic underlying framework for lessons or workshop.
I also totally agree with the need for project and passion.
So how do the two things fit together?
For example... my own children joined our workshop, and since they have already tried 3D printing before they came ready with ideas: "I'm going to 3D print a penguin." ... passion, great.
From that point onwards though it didn't matter how i set up my little introductory story, how I presented the design challenge, how we even brainstormed. Once the kids were left to work on their idea, my kids started working on making a 3D model of their penguin - which I was very happy about except that it had nothing to do with the topic
I'm wondering what your thought are about maintaining passion and at the same time guiding the learning process , especially when using "design challenges" (applying design thinking) or open ended questions (SOLE).
If we figured out a way to blend these ideas together that would be a Montessori 2.0