While we were casually discussing Walt Disney tonight, the kids asked me if he's still alive:
Me: No, he died before I was born... maybe when [my parents] were teenagers?
D- (jaw to the floor): Whooooooaaa!! He died a LOOOONG time ago! ...I can't even beLIEVE it!
M- (running in from the hall): D-, he died like a hundred YEARS ago!!
D-: I know!! I can't believe it!
Time really is a fuzzy concept for them, whether it's years, days, or minutes. It's generally baffling and/or frustrating, but luckily, I'm occasionally able to use it to my advantage.
You may enjoy my previous (4YO daughter) M- conversations, (7YO son) D- conversations, and (wife) J- conversations.