I'd say around inbetween too. All four should be around the age that's been figured out for them. I can't quite remember what they are, but I think Digory's 12, Polly's 11, and both Shasta and Aravis are either 12 or 13. If they could keep near those ages, I'll be very pleased!
And I don't think we can say everyone so far (meaning Eustace and the Pevensies) were teenager-aged. By VDT, If Lucy was 11 and Edmund was 14, and Eustace is supposed to be younger, he'd be around 10. Then, Susan'd be 16, and Peter 17 (
![Surprise :-o](./images/smilies/13.gif)
). I might be wrong (someone reason for me or against me if you like), but those I think are what the movie ages were. Jill also should be Eustace's age (whatever that'll be in SC). So I wouldn't quite say they're all teenagers, but most of them are close to that.
![Happy :)](./images/smilies/1.gif)