My son,who is eight, has a compound and a longbow, he shoots several times per week. I noticed his compound hanging up in the shop, with cobwebs on it... he actually shoots the longbow better because, for him its less complicated...I left it up to him and right now he likes shooting the longbow...If I were introducing him to a compound again it would be without the release, peep sight, kisser button, etc. A simple stick and string is a great way to introduce the youngsters to archery. The form transfers over well if they decide they would rather shoot a compound, later. With the information and support we have now, I'd bet that most kids would stick with traditional tackle...
David