This point is critically important because TBI in developing brains is especially disastrous with lifetime implications. This isn't a risk/reward discussion bec

This point is critically important because TBI in developing brains is especially disastrous with lifetime implications. This isn't a risk/reward discussion because TBI's are basically everyone if they're playing hard. So there's guaranteed downsides. Children should not be doing this, ever. http://www.biausa.org/brain-injury-children.htm#recovery http://www.biausa.org/brain-injury-children.htm#recovery