When a person has the right to keep and bear arms, it means that they are allowed to own and carry guns, like hunters do or even people who have them for protection. However, there are some rules and laws that need to be followed. This right is protected by the Second Amendment of the United States Constitution.
For example, it's like having a toy or a candy you really like or want to keep with you. This toy or candy, like the gun, is yours and you can have it if your parents agree and you follow their rules. And just like you should not share your toy or candy with someone who is not allowed to have it, people who own guns should not share or give them to someone who is not allowed to have them either.
It's important to remember that owning a gun is a big responsibility and it's only for adults who are trained and responsible with it. So, just like you are not allowed to play with toys that are not safe or that you could hurt yourself with, not everyone can have guns because they can also be dangerous if not handled properly.