I saw the question pop up recently, and one answer in particular drew my attention. It was a terrible answer at first, but it turned out that its poster was on the right track, and after a few edits it became a fairly good answer (referencing canon sources, unlike other answers to that question).
Since it's deleted (requires 10k rep to view), I'm providing it in its entirety here:
I found a youngling logo, from "The Gathering" episode (season 5, episode 6) of The Clone Wars, worn as a shoulder patch on students' cold weather gear.
The Wookieepedia article on younglings provides a cleaner logo.
Problem is, that answer's been deleted (maybe rightly so, before the edits). I did flag for undeletion, yet was denied that. I really think this is a good answer right now. Can we please bring it back?