I recently ran a build-your-own-quadcopter workshop in Canberra (Australia), where 9 people learned how to construct, tune and fly quadcopters based on the Pixhawk flight controller.
This workshop is the second one I've run (1st workshop here). There have been several improvements this time around: A stronger frame, pre-soldered connectors and usage of the Pixhawk.
There were of course minor technical difficulties (such as not ordering enough standoffs!) along the way, but we got there in the end and everyone had a great time!
For those that want to run their own workshops, I've published the documentation for this workshop here. It includes a full workshop manual, APM:Copter parameters file, materials list and useful links.