We use a lot of unschooling techniques, a lot of 'strewing' goes on here! Strewing is when you leave out books/websites/whatever on topics you think will interest them.

I have found it works quite well for us most of the time, but the problem I have is that my son is so young that he often wants to learn more, but he doesn't have the experience to know how exactly what he wants to learn about, to even know it exists. So we use curriculum, but in quite an unschooly way.

It actually seems like harder work for me than sticking a workbook in front of him would be!