here's my advice, for what its worth...
Its important that a young archer has the correct form from the get go. I think finding a quality archery proffesional is as important as what type of bow you end up with. Thus, I recommend Turk's Sport Shop. He is located on the corner of Ooltewah-Georgetown Rd. and Mahan Gap Rd in Ooltewah. His number is 326-1812. He is absolutely great with kids, heck he taught me how to shoot when I started.
He is a muti-branded distributor and even has some used archery tackle avaiable sometimes. I highly recommend him. Tell him Churly sent ya! Good-luck, and way-to-go on getting the youth involved!