I have always enjoyed STEM outreach, be it talking about the UAV research I have been involved with at the Ladies Luncheon Club (average age of ~65) or showing how you can use node.js to control a Parrot AR drone to a group of hormonal teenagers.
Besides an interest in flying things I have always had a weak spot for maritime vehicles, particularly submarines. (For some reason land vehicles never really interested me). Triggered by the OpenROV kickstarter and, more recently, by listening to The Engineering Commons episode on Underwater Robots with Bill Porter, I have been looking for opportunities to learn more about them or even build them. As my own spare time has pretty much disappeared for various reasons, doing this as part of my STEM Ambassador work seemed a great idea.