If allowed, learning happens so naturally. My nearly eight year old Troubles is suddenly enamored with all things desert. If I had planned lessons on my timetable, they may or may not have produced some knowledge about the topic, but since it is self-motivated learning, it's ALL absorbed with enthusiasm! He expressed interest in deserts last summer and we read a few books about them. It's interesting how curiosity goes round and round.
Some resources from this study: