I also think the western governments need to watch out. IF it turns out that mRNA are harmful to children's developing bodies, and some are left with permanent life long health problems in the future - because we don't know at this stage that isn't going to happen, then this is a law suit, perhaps millions of lawsuits waiting to happen.
You can't railroad and force generations of children that are highly vulnerable and unable to stand up for their own rights into a vaccine that is untested.
We could see en masse legal action, long term health implications and governments held to account for years embroiled in legal action. If it goes wrong.
How do you even start to explain your thinking behind allowing this to happen to your child/children? What do you say 'oh well we wanted to try and protect the old anti vaxxer guy down the road who is 85, so we thought we would give the vaccine to you instead (as you can't refuse like he can) for the good of everyone else, untested sadly, but we were told it was fine' 
There is a very good reason JCVI are distancing themselves from this next stage of rollout, and not all of the reasons have been made entirely clear.
Don't forget we as parents will also be held to account, both to ourselves and to our children in the future. This decision is not for free, we have to live with the consequences either way. No one else. That is why I am so reluctant given their actual covid risk is microscopic.