The Amelia Earhart Balloon!
Though I have to say I would have preferred Admiral Grace Hopper.
My first reaction, I'm ashamed to say, was "Balloons?! Let's get serious." But fun things are serious, especially -- or necessarily -- when you don't have to pay rent to consume them, and an Amelia Earhart balloon, making the contributions of women visible in the most literal way, is a happy thing, like all balloons. So have at it, say I.