naw dude i think at that age he should be riding something with a flex like the invader junior (line). He just wouldn't have the weight behind him to properly flex the anthem and i don't even know if they make it in a size that would be right for him.
But ya for sure check out the invader junior cuz of the price and you just can't go wrong with line as a manufacturer.
T "It's my storm. I can make it do whatever I want."