Have you ever seen a hot air balloon in the sky? A zeppelin is like a hot air balloon, but it's much bigger and it can carry a lot of people and things inside.
A zeppelin is a special kind of airship that's filled with gas, like helium, that's lighter than air. This gas helps the zeppelin float in the sky, just like a balloon filled with helium floats up to the ceiling.
But a zeppelin is different from a hot air balloon because it has a long, tube-like shape with a metal frame and a big engine to make it go forward. The people and things inside the zeppelin can sit in comfortable seats and see the world from way up high.
Zeppelins were first invented a long time ago, in the early 1900s, and they were used to travel long distances through the air. Nowadays, we have airplanes and other faster ways to travel, so zeppelins aren't used as much anymore. But they're still really cool to look at and learn about!