You don't tell us about the background. But I would say not to introduce the child at all. Prodigies will seek and find for themselfes, I'd assume. If it shows

You don't tell us about the background. But I would say not to introduce the child at all. Prodigies will seek and find for themselfes, I'd assume. If it shows interest, asking questions, then you may try to answer. If it is a prodigy, it will understand. If not, well, then there is no need to introduce a five years old to CS.