This question is in effect asking “How do I mould and shape my child into a person who believes that individuals should be free from unwanted moulding and shaping by others?”
That parents have obligations to their children that their children do not have to them is not because children are lesser humans. It is because we parents have freely chosen to place our children in the positions they are in, living with us instead of having been adopted at birth, say. It is we parents who have the obligations to our children, not our children who have obligations to us.
Children should not only not have any medical procedures performed on them without consent, they should be in control throughout. That applies to vaccinations and everything else.
Children are no less creative and rational than adults, whether or not they yet have the explicit language in which to express themselves.
How do you yourself determine what to eat? It is the same with children. What we eat is determined by a number of things, including what we feel like eating, which may be affected by our ideas about health and other things.
Even if childhood coercion has virtually no effect, it would not change what it is right or wrong to do to people. And it is not right to do things to people that will impair the growth of knowledge.
Taking Children Seriously is a new VIEW of children—a non-paternalistic view: children do not actually need to be controlled for their own good. An Oxford Karl Popper Society talk.
Children have to do what they themselves think is right, with no pressure whatsoever—that’s what non-coercion amounts to—but they also have a right to be told morality as best we see it.
In their anxiety about dirty hair, parents often forcibly wash their children’s hair or try to get them to allow shampoo on their hair. Bathtime then becomes a battle instead of fun, the child feeling as frantic to maintain control over what happens to them as you or I might in a similar situation. Exerting more coercive control over the child is a recipe for disaster.