Up until a certain age a child learns through observation.
But there comes a point when a child can learn new concepts by simply having them explained by an adult.
This age is kind of like when the child becomes "programmable".
What age is this? And how many words does a child know at this stage?
And what age can a child be taught algorithms? Like "To do this, you first do this. Then if this happens, do this."
And what age can a child teach other people algorithms?