Marketplace®
Every story is an economic story
Season 10Episode 2Apr 21, 2026

Why does the price of gas go up and down?

Bridget and Ryan hit the road to find out!

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Why does the price of gas go up and down?
Binglin Hu

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If you’re anything like “Million Bazillion” listener, Elijah, you may have noticed gas prices change from one day to the next, sometimes by a few pennies, sometimes by a lot more. Why does that happen? Ryan and Bridget’s search for answers turns into a much bigger adventure when a falling star and misplaced wish mean Ryan’s car suddenly comes to life and takes them on a wild road trip. Together, Bridget and Ryan learn what the price we pay at the pump has to do with global forces and crude oil's long journey to becoming gas in our fuel tanks.

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Tips for grown-ups listening to “Million Bazillion” with kids

Money Talks

After listening to the episode, here are some questions you can ask kids about gas prices:

  1. What are some things that can happnen to make gas prices go up and down?

  2. Have you noticed the price of gas lately? Was it more or less than you’d expect?

  3. If your family is thinking about making changes to your spending this summer because of gas prices, this is a great chance to talk about it! Try starting with something like, "With higher gas prices, we might decide to make some different choices..."

  4. Bonus Not-So-Random question: If you could use anything to power cars, what would it be?

Tip Jar

For listeners who want to keep the learning going, start here:

  • Grownups, if your kid has questions about why gas prices end in 9/10 of a cent or why aren’t all gas tanks on the same side of the car, Marketplace has you covered!

  • Interested in learning more about climate change? Check out this episode from “Million Bazillion.”

  • If you want to know more about how cars are made, check out this “Million Bazillion” episode.

  • VIDEO: Here’s a short video from PBS explaining where fossil fuels came from.

  • And if you enjoyed hearing Ryan’s car come to life, you’ll want to hear what happened when childhood toys started talking in this other episode of “Million Bazillion.”

Gimme 5

Grownups, we’d love to hear from you. How has listening to Million Bazillion helped your family learn more about money and the economy? Send us a note using this online form. Thank you!

The Team

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