Season Three
The SGC participates in an exchange of knowledge with an advanced race, the people of Orban.
However, all the experts are children, their knowledge comes from nanite technology. Once they reach a certain age the nanites are removed and distributed between the whole population, leaving the donor a near vegetable.
11 Year old Merrin teaches Sam how to build a Naquadah reactor, Jack wants to teach Merrin how to be a child!