That was my knee-jerk answer as well. But you know that the next question will be "How?""Nature made it."
I dunno. I was thinking about getting a dinosaur book, and looking at the pictures of the plants in there. "These dinosaurs ate plants millions and millions of years ago! That's a really long time!" And maybe later having a discussion when something-- a baby, kittens, puppies-- is born. "Does the kitten look just like Mama Cat?" Just to get the idea that babies look different than parents-- changes occur through generations.