Where animals come from

From George
After watching Ratatouille, in an effort to put off the inevitable time she has to go to sleep:
Gwen: Papa, what are animals made of?
George: Much the same things that we are. Flesh, skin, bones, hair...
Gwen: No, I mean where do animals come from?
George: They grow from little animals, like people grow from little people.
Gwen: And where do little animals come from?
George: From their mother's belly. Every animal has a mother...
Gwen: And how do they get in their mother's belly?
George: That's complicated, I'll explain it later.
(Pause)
Gwen: Papa, I know where animals come from.
George: Really?
Gwen: Yes. First there are these little microbes. Then bigger, long microbes stick on to them. By sucking, like this. (Demonstrates sucking in air.)
George: And they stick together to make animals?
Gwen: Yes. The legs get made first.
George: Really? Who told you this?
Gwen: Yes. Let me remember what my grandfather told me. The legs get made first, then the stomach, then the back, the arms, the fingers, the palms... No, that's not right, these are animals, they don't have fingers. It must be the animal legs get made first, then the paws...
George: Oh. That makes the whole animal that way?
Gwen: Yes. And then after the animals die, they turn into people.