A stadium is like a really big playground, but instead of swings and slides, it has a huge field where people can play sports like soccer, basketball, football, and baseball.
But it's not just a big field. It also has lots of seats where people can sit down and watch the games. Some stadiums have a roof that covers the field and the seats so that people don't get wet when it rains.
It's important to keep the stadium clean, so it also has people who pick up any trash or litter around the field and the seats. There are also people who sell food and drinks to the people watching the games, so they don't get hungry or thirsty.
Stadiums cost a lot of money to build, so sometimes they are built with help from the government or people who invest money in them. They can also be used for other things besides sports, like concerts or events. So, they are an important part of many communities and bring people together to have fun and enjoy different activities.