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and Echo devices. Wow, we're sure going up pretty high.

Yep, look how small the trees and people look down there. Hi!

Uh-huh, and we're still going up.

Psst, hey, smarty pants. Can you guess where I am right now?

Oh, we're at the top.

Only one way to go now. Straight down.

Ha-ha, smarty pants. Did you guess we're on a roller coaster?

Woo-hoo!

Yikes, this is fast and bumpy, and now my tummy's floating. Oh boy, it's over.

I just had the ride of my life in less than two minutes.

But how do roller coasters work?

We're the earliest ones on ice.

And what are some of the craziest ones today?

Strap yourselves in for another riff of science on...

Who's smart-ed? Who's smart-ed? Who's smart-ed? Is it you? Is it me? Is it science?

Or history? Listen up!

Everyone! We make smart-ed. Lots of fun on who's smart-ed.

Okay, smarty pants. We're still at the amusement park.

...