I read the article, and it made me think that I can't think of anything like a Childrens' Bill of Rights. Just basically thinking out loud here but...
Everyone talks about wanting to protect children, but there is no basic framework in place to treat them differently in protecting their individual personhood. Something basic, written in simple language, that a young child can understand, to make sure they are treated fairly and safely. Like a little laminated card you can give children when they get to school.
Children should have some agency in their own care, or to be able to protect other children, but we leave all the legal action in the hands of those who would be the ones causing them harm. It just seems odd to me.
Disclaimer: Not a parent, not Canadian, just someone who came across this and started thinking....