faces a different ages.

The composition of a child's face is much different than that of an adults... and the key to an accurate children's portrait us understanding that...and {the much harder thing, applying it on paper.}
One of the major differences is that the face pretty much begins halfway through. The forehead makes up half, or sometimes over half of the face's composition. Also, the head is a lot rounder. The eyes look a lot larger compared to the rest of a face. Another thing to note is the lack of a defined jawline and pointed chin, and not really prominent cheekbones. The nose, jaw, and eyebrow ridge are upturned a bit more as well. This picture shows how a child's face changes throughout the years. It's not that detailed, but it gives a rough idea...








This picture {despite how weird it looks} is pretty accurately showing the difference from the side view...













Finally, This link was very helpful just to see some examples :)
http://www.pxleyes.com/blog/2010/04/50-ultra-realistic-children-portrait-drawings/

With all of this information, plus a bit of tips from my art books {listed on the resource page}, i'm going to try to get some practice and hopefully post a few of my attempts sometime this week or next.