Thank you, Yukichigai, for being a voice of reason in this thread. The issue at hand is the kid's beard, not his future position in life because of something that grows on him. Even still, we'll expand on that

. Making this kid submit and shave through coercion is not setting a good example. Yep, I said example. Kids will rarely do what you say, but they WILL do a lot of what you do. If a clean look is important to you, let it be important to you. Your child will pick up on it, and may come to appreciate it, if it is indeed for her/him. What do you teach your kid by forcing him to shave? Hard-liners would say discipline, obedience, and good ol' American appearance standards. That's fine...if you want an android for a child. How about you buy the kid what he needs to shave (blade razor, cream, and a sideburns trimmer, beard trimmer maybe) and help him make the decision. Teach him that you trust him.
FYI, that is the approach my parents took. I was growing a moustache at 14. I promptly shaved it off because it made me look like a gay cop

, though now I frequently change my appearance.