It would be remiss of me not to mention Thomas Jefferson's birthday (even dead people like attention, I am sure), especially given that my home page features a Hamilton quote.  So!  This is for you, Mr. J. -- and a very few of the very many cool things you loved:

A chair that lets you fidget without actually moving

Weird bugs
 
American animals are big -- BIG, I tell you, Europe, BIG!

Playing in the dirt