A closer look at “Why Does a Crisp Packet Puff Up on a Mountain? Kids’ Science Quiz Explains”, exactly as the source publishes it. The Guardian Lifestyle Oct 17, 2026 • 6:00 AM If you’ve ever hiked up a mountain with a bag of crisps, you might have noticed it swelling like a balloon. That’s because air pressure decreases as you climb higher, so the air trapped inside the packet expands.
This fun fact is one of five multiple-choice questions in the latest kids’ quiz from Molly Oldfield, host of the Everything Under the Sun podcast and author of the quiz book series. The quiz, set by children, invites young readers to test their knowledge on everything from science to geography. Oldfield, whose new book Everything Under the Sun: All Around the World is out now, encourages kids to submit their own brainteasers for future editions. For the complete material, the listing points back to the source inside the network.