Explaining that in 15 seconds on an elevator is a bit challenging--there's a lot of background to explain, and you can't just assume people know that charged particles don't move in a straight line when magnetic fields are about.
Suppose each grad student writes a thesis and a "poster-session" explanation of it, with the target audience being high-school students who've had only some physical science. These we make available through department and experiment web pages, and as part of the material brought along on outreach events.
There's a lot of background material that needs to be available. This kind of project is more suited to web pages with plenty of links, than it is to a video talk. The readers can follow links to whatever explanations they need as they please. (What's angular momentum? What's momentum?) The background material the Department can supply, maybe piggy-backing on existing material other universities have compiled. A “poster-talk” style description of a research project aimed at high-school level students and the general public requires some resources.
When I first floated this notion I found that several universities had already created collections of web pages explaining vectors, momentum, and so on. Some concepts were illustrated with animations. At the time many were incomplete. I assume that the body of illustrative work is much larger and clearer now. It takes a lot of effort to do these.
We need elementary mechanics, E/M, vectors, trig, elementary thermodynamics, simplified quantum mechanics, statistics, and so on. A lot of this exists already but has to be coordinated. Look and feel customization is low priority.
Some of the research concepts will be more advanced, and specific to neutrino physics and astrophysics in general. We would probably have to create those ourselves. We’ve done some work already, but we’d need more, and need to integrate this into the framework of more basic explanations.
In particular, some concepts are best described visually to a non-expert, and in my hands it took a lot of time to create useful graphics.
We also need someone familiar with the supporting material to help the student. This person needs to be very good at explaining concepts simply, and patient.
Iterate a time or two to incorporate their feedback.
The initial project may want some eye-catching display. This takes designer time.
We link to this from qr-codes in our outreach materials, posters, and so on.
The cost of collecting and preparing the supporting material is mostly front-loaded. Creating thesis-specific material and providing advising support are ongoing costs. Perhaps we could create materials for a mini-course in “writing for the public.”
Some professors are absent/not good at simplifying/eager to get the student out the door. These students will need some help from someone else. Who?
Unless this is across-the-board policy, most students will plead for an exception.
For the Proof-of-principle study, we need a lot of volunteers, because everybody is busy.
It is hard to evaluate the effectiveness of this project. Intuitively it seems useful, but if it inspires students we won’t know for years.