Give them a minute; they will come up with something.
Contrarian here:
Toddlers being able to read adults and please them is not so much altruism as it is a means of survival.
I have no problem with behaviors, instincts, tendencies and other non-material things arising from DNA. Why did God give us such complicated DNA? For our physical being only? We are not souls driving around in meat machines; we are spirit and flesh in unity.