More people are born in September than any other month. You'd probably find the same stats with a non-billionaire population. After all, it's COLD in January!
Admission is free! I had to keep reminding myself of that when I saw the prices of the food offered. Drink are pricey, too. That's why no sack lunches are allowed. So if you've got a lot of mouths to feed, eat before you go. Otherwise, just keep reminding yourself that admission is a real bargain. Because it is.
An entire chocolate cake is pretty easy; it just takes longer to cook in an oven. The best way to make a cake is to say, "Kids, I'm going to take a nap. Why don't you make a cake for tonight?"
http://www.yesbutnobutyes.com/archives/2007/10/shenis.html
The National Zoo is also part of the Smithsonian.