At about 3-5, my son could remember in perfect detail just about any situation that had happened from about age 6 months forward. However, at about 5, these memories started fading and turning into snapshots instead of stories. At 8 now, he remembers some incidents or situations but we have photos of many of them (birthday parties, festivals in town etc) so it's hard to know what is a "real" memory and what is remembering looking at the pictures.
The stuff he does really clearly remember is now mostly from ages 3+.
