I wonder if the bills sponsor has done any research to see if any helmet laws that have already been in place have in fact, prevented life changing brain injuries in children.

I doubt he has because if he had, he would see that they haven't.

If the goal is preventing life changing brain injuries, he should be promoting cycling, because the vast majority of these injuries could be reduced by cycling. Everybody ignores the large number of brain injuries caused by things like strokes, heart attacks, seizure disorders, vascular disruptions and focus on the relatively few trauma related causes.

The couch, TV and chips have killed far more than cycling has. Cyclists live longer lives, not shorter lives.