I know. I've seen that too. It's eerie. I've seen tests where one of the kids was poked with needles (I'm talking big needles) and didn't even flinch. There is no adequate scientific explanation for this.
Her main message to the children was "Pray to Jesus. Pray ceaselessly." Sounds like something Mary would say. She also told them that the twentieth century was given over to Satan for him to unleash all evil, but God would overcome him. Have you ever read Walker Percy's "Thanatos Syndrome"? At the end of the novel, the priest character talks about this message from Medjugorje.
No, I've not read it. I'll check into it though, thanks!