Isn't it magic?!

I had just gotten Lucy down settled down to bed when she called for me to come down. I came down and she announced she needed to go to the bathroom. While she was going poop, she said matter of factly, “Potty are liquids that our body doesn’t need, and poop is food that our body doesn’t need. Isn’t it magic how the body can make potty & poop? I’m going to ask Heavenly Father about that in heaven.” I didn't know quite what to say, so I said, "Well, it's good to ask questions. That's how we learn." I have to say that 'magic' was never quite the word I've thought about the digestive process.