Long Beach is a big city in California that's located by the ocean. It's sort of like a neighborhood that's really big, with lots of buildings, roads, places to eat and shop, and people living there.
Long Beach is also home to a really big port where big boats and ships come in and out, a lot like a very, very large parking lot for boats! There are cranes there that help move boxes and containers from the ships onto trucks or trains to be sent to other places.
There are also lots of fun things to do in Long Beach, like visit the Aquarium of the Pacific to see all kinds of cool sea creatures like sharks and penguins, or the famous Queen Mary ship, which is now a hotel and museum.
Even though Long Beach is big, you can still find places to relax and enjoy the outdoors. There's a really big beach with soft sand and blue water to play in, and lots of parks where you can run around or have a picnic.
Overall, Long Beach is a great place to visit or live in, with lots of things to see and do, and the ocean always close by!