Questions from Waverly

Waverly is 4 years old and she is very interested in everything these days. Here is a sampling of unprompted questions she has asked me at random moments over the last few days:

Why does medicine make your body feel better?

How do you make meatballs?

How does gas make the car go?

What was there before the Big Bang?

I was a little taken aback by that last one, so I asked her, "What do you mean 'the Big Bang?'" To which she nonchalantly replied, "You know, like before the earth and the universe were created. . . "

I am not sure what it means that our 4 year old has already exceeded my ability to answer her questions, but I suspect it isn't a good sign. I mean, I sort of know how meatballs are made, and I vaguely understand how a combustion engine works, but I am already in over my head with this kid.