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Psps, smarty pants. I have a question. What if it was someone's birthday or your birthday?

And you're planning a party? What do you need? Cake, candles, invitations. What else? A bouncy

castle? Maybe. A clown or magician? Sure. But think, what is something you see at almost every

birthday party? Did you say balloons? That's right. You can't have a proper birthday party

without balloons. And balloons aren't just for young kids on their birthday. You see balloons at

weddings, graduations, and pretty much any party. But why? How did the balloon become a symbol for

celebrating? And what exactly are balloons? Who invented them? And did you know that early balloons

were made from animal guts? Yeah, you probably don't want to use old balloons at your next

birthday party. Oh, and why does helium make your voice sound like this?

Get ready for another whiff of science, son.

Who's smart? Who's smart? Who's smart? Is it you? Is it me? Is it science? Or history? Listen up.

Everyone, we make smarty lots of fun on who's smart?

Okay, so it's your birthday. You know you want lots of balloons in your favorite colors,

and some big helium ones too. So you head to the store to buy some, and the person at the

counter asks, welcome to party city. Can I interest you in some old balloons? Or would you prefer

new balloons? What are new balloons? New balloons are the colorful latex or foil decorations

typically filled with air or helium, used in all kinds of celebrations during the past 100 years.

...