My friend had an NDE when she was three. She says it was like a classic account but slightly nightmarish, saying she remembers at first a heaven-like scene before being told "don't look down", but she does anyways and sees everyone she knows in the other afterlife. I don't know how much CPR she needed that time, but she'd then need it again at the age of fourteen because we were screwing around and needed rescuing (I did not need CPR). Ironically she knows CPR, the only one in my prime social circle who does, so it's scary she's always the one who needs it.