My 9-year-old son is learning HTML so he can create his own websites. One of the advantages of child-led learning, is that children retain their interest in learning, and can therefore learn!
His greatest interest is origami, and he creates these amazingly intricate sculptures with paper.
I read in "Popular Science" that there is another fellow who reminds me a lot of my son.
20-year-old Erik Demaine, once homeschooled, now an MIT assistant teacher, is also into origami. He has taken it to a whole new level, mathematically speaking.
He started college at the ripe old age of 12, and, if I remember correctly, was beginning his doctoral studies when he was 16.
And he was, basically, unschooled by his father!
Here is his link
Homeschooling works!