As @Ilikecomputers mentioned in the "Almost launchable..." thread, images for early teen heroes tend to be Just a Face and a Caption - "Early Teen" is easy to get, but "Hero" isn't.
This thread is for suggestions for images of actual early-teen heroes.
I don't know whether the first image on this page about A Certain Scientific Railgun is good enough - Railgun is definitely a teen and she's using her metahuman power, but is she heroic enough and does she appear to be young enough? (Just because I know she's supposed to be 13 doesn't mean that it shows in the image.)
While I'd rather find a live-action TV or live-action film example, I couldn't come up with one in a quick think... hence the anime example. If somebody can come up with something better, please suggest it.
Don't worry if there's already a suggestion or two here when you make your suggestion. we can always put other images onto an Image Links subpage.
@Agiletek @GentlemensDame883 @HeneryVII @Jlaw @Lequinni @RivetVermin @Umbire the Phantom @Utini501 @Labster @Looney Toons @GethN7 @Robkelk @QuestionableSanity @Derivative @SelfCloak