DS (almost 4) can summarize the day and draw identifiable pictures. DD (2) can summarize, but I can't tell what she's drawn just by looking at it. DS is a chatterbox and it rubbed off on DD, I guess. I remember my brother having trouble with the whole concept of yesterday/today/tomorrow, though. To him, yesterday meant any time in the past, and tomorrow was any time in the future. So there's definitely a pretty wide range at that age.