Mommy, where did I come from?: Darwinist activist-style
Here's a kid tee perfectly suited to the Darwinist activist mom, though it is anybody's guess what it would do for the kid.
From what I have seen, most kids who ask "Where did I come from," are expecting the, um, Big Talk. They sort of know there is something to know or they wouldn't even be asking.
Telling them they come from a slime mold or something isn't going to cut it. Most likely response: "So what? Can we get to the part about how people, um, do it." (Even if slime molds "do it," who really cares?)
It all reminds me of the Canadian kid who recently asked the "where did I come from" question. His devoted dad huffed and puffed his way through the complete (and politically correct) lecture, only to have the little swine respond, "Wow, Dad, that's way amazing. But ... I still don't understand. See, the reason I asked is that our new goaltender, Chung An, comes from Vancouver ...."