BTW, as you're sculpting a Roxie too, are you aware that one of the biggest give-aways regards a persons age is the size of their head in relation to their body?

Babies have a huge head in comparison to their body.  A child or pre-teen still has a notably large head but not as obvious as that of a baby.  On a late-teen (Roxie) the head is still larger in comparison than an adult would be, but not as abvious as a child. 

Once you become a mature adult, those changes pretty much come to a halt.