Kamri Noel and four of National Geographic’s experts find out how things work.

00:00 How Submarines Work
Kamri Noel asks marine biologist David Gruber to explain how submarines dive and navigate.

02:19 How Gecko Feet Work
Kamri Noel and National Geographic’s David Gruber discover what makes gecko feet stick.

04:31 How Popcorn Works
Popcorn is a delicious snack, but Kamri Noel wants to know what makes it pop.

07:12 How Lava Lamps Work
Kamri Noel is on a mission to find out what's really floating inside lava lamps.

10:09 How Fitness Trackers Work
Kamri Noel wants to know: How do fitness trackers tell how many steps you’ve taken?

12:49 How 3-D Printers Print
Kamri Noel is on a quest to understand her 3-D printer with the help of a Nat Geo expert.

15:20 How Digital Cameras Work
Kamri Noel and photo engineer Tom O’Brien explore the science of digital cameras.

17:13 How Trebuchets Work
Kamri Noel asks National Geographic’s Tom O’Brien about the physics of medieval trebuchets.

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About National Geographic Kids: Nat Geo Kids makes it fun to explore your world with weird, wild, and wacky videos! Videos featuring awesome animals, cool science, funny pets, and more, are made just for curious kids like you. So pick a topic you love and start watching today!

How Things Work | Submarines, 3D Printers, Popcorn & MORE | Nat Geo Kids Compilation | @Nat Geo Kids
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