Either that or this is a blog post about `Things that didn't happen.`. If OP is claiming a 6 years old understands what `He gasped in astonishment at the idea of putting function machines into function machines` means then he is lying.
Why is it so hard to fathom? I'm pretty far from smart but I understood functions at that age, and going a few steps further is not that hard. Besides, this is a child of a brilliant CS professor we're talking about, not your average kid.