J.A.
I think the risk of injury is greater in tackle. A kids head weighs roughly the same amount as an adult yet their neck and spine are weaker, making head injuries more serious. I believe that there is a reccomendations that a kid be 12 or so before playing tackle. I have a 10 y/o son who is nearly 11 5' 1" and 118 pounds. He will play flag this season as well, and next as well.