It was said in the first part that newborn boys look more at mechanical things, and newborn girls look more at human faces. I have heard that newborn children have difficulty to see things; at least their eye movements do not follow moving objects. Could someone give me a better information on this?

EDIT: By the way, I found a study that male and female monkeys prefer different toys. This seems like a more solid evidence for the biological differences. Still curious about the newborns' eyesight, though.

EDIT2: Use the Wikipedia, duh! Seems like newborns have poor eye coordination and depth perception, but are still very good at recognizing a face of their mother.