Quote - Whenever I try to create a young face for a male, a teenager, it ends up looking like someone older.  I've been trying for months to create characters for a comic.  Hiro comes out looking too toonish, M3, D3 and M4 just don't look like teenagers.

Any tips for younger faces beyond rounder head, larger head?

A pic of what you have so far might be helpful.

Smaller jaws, larger eyes, larger foreheads (cranium) in proportion to the face, smaller noses, less pronounced cheeks, less facial lines/wrinkles, larger ears, etc..

Take a look at some artist's sites and look for proportional guides for young faces.  I'm sure there have to be some out there.