I've known a couple of children who talked about when they were here before. This was when they'd just started to talk properly, and they gave quite specific details (names, addresses, events) that 2-3 year olds simply wouldn't know.
The other thing that I find weird is that the two men I have felt the strongest physical connection to in my life (as in, sure we have had amazing sex before, even though I have only just met you) were born on exactly the same day.
I met them 25 years apart, and didn't realise that the second one was born on the same day until recently.
I wonder whether I'd been with them in a previous life 