The Never Ending Series of 'Why?'

Going back to work I have noticed there are questions the kids will ask that I do not have an answer for. It's a weird sensation. Kids are so curious and most of the time, their questions are of pure innocent information seeking. A few days ago I was asked, and not for the first time, 'why do you have this?' and they point at the bulge sticking out of my neck - my Adam's Apple. (which according to wikipedia is actually called the laryngeal prominence and is caused by the formation of the thyroid cartilage around the larynx - you can read all about it here.)

I have also been asked 'what is this?' referring to the same thing. This and many other questions leave me briefly stumped. I know the natural and simple response to both questions 'It is my Adam's Apple, it is something boys get.' Unfortunately, anything that is not incredibly clear is followed by the never ending series of 'Why?'

Understanding that my first response to those questions, or many others like them, will lead to the six thousand 'whys' before I have either confused the poor kid(s) or satisfied their curiosity enough that they think they understand, I freeze and ask them to repeat their question. This gives me time to think of a more succinct answer that might avoid traveling down that road.

To clarify, I do not get annoyed by the series of 'why?' when it occurs, nor do I grow tired of it. Instead I just try to get it right the first time so they do not get so confused and need to ask why over and over again. Most of the time, when I fail speak at a level that can both answer the question and allow them to follow my answer, I end up laughing at the persistent curiosity in all of them before I can get it right. This especially happens because, typically, I am not answering to one kid, but a few of them, and their noticeable persistence attracts others and what started as one curious little one escalates into 5 or 6 kids crowding around all asking why, some without even knowing what is going on, which further confuses them when I answer and they don't know what they just asked 'why' about.

Did I mention I love my job? Sure it'd be nice to get paid for it, but not getting paid hasn't stopped me. I probably could have applied for an actual paying position this semester, but I like this too much.