There's lots of people making games at young ages <img src="{SMILIES_PATH}/icon_razz.gif" alt=":P" title="Razz">
However, I don't think you should restrict your game development outreach to just a target age range. I've said a few times now but share what your goal game ideas are instead, that's how to produce passion <img src="{SMILIES_PATH}/icon_e_smile.gif" alt=":)" title="Smile">
Passion isn't something you have before you have an idea, it's something you apply to make your idea real <img src="{SMILIES_PATH}/icon_e_biggrin.gif" alt=":D" title="Very Happy">
In reference to the other topics kinda related to this whole working together thing, start making things, start a dev log on the forums, post demos of the game even as it is still a work in progress or record videos on youtube of the development. Eventually someone might see it and go "I'd love to work on that too!" <img src="{SMILIES_PATH}/icon_e_smile.gif" alt=":)" title="Smile">