My kids are a little...eidetic-ish? DD9 remembers events from 18 months, which I consider unusual but not way out there. What was very unusual about both of them was their ability to memorize and flawlessly recite very long books (like the long Seuss books or other very wordy, lengthy picture books) after only a few readings, as quite young toddlers. This seems to be pretty common among gifted kids. We would forgot how odd this was till other people saw them doing it. It FREAKED PEOPLE OUT. DD also has memorized the entire scripts of the plays she's been in. Yet I do feel her ability to do this is fading. And I don't know if DS can do this as much anymore, either. I think it was something they needed more before they could read.