Frankly guys, I think the model companies have pretty much figured out that going for the younger crowd is a waste of time. The current generation of teens have been raised on the internet, Xbox, cell phones and instant gratification is too firmly a part of the mentality, for something that requires patience and practice to become important to them.
Now before folks get up on their high horse with all their stories on how their children build, I'll just say this. Your children's interest is a direct reflection of your own. I have two near grown sons and the one who does build, only get's involved when I'm really into my own project and it becomes something we spend time on together. When my life creeps in and my building time dwindles, his interest lags and he's back to whatever computer game interests him.
Now that's not to say that it won't become an interest as he gets older, like it has for many of us. I sincerely hope it does.