Okay kiddo, the law of the United States is like a big set of rules that everyone in the country has to follow. These rules help to keep everyone safe and make sure that things are fair for everyone.
There are lots of different types of laws in the United States, but some of the most important are the ones that have to do with the Constitution. The Constitution is like a special book that was written a long time ago to help guide the country. It has things like the Bill of Rights which talks about the freedoms that everyone has, like the freedom of speech and religion.
There are also laws that are made by the government. The government is kind of like a big group of people who make decisions for the country. They create laws to help keep things organized and make sure that people are doing what they're supposed to be doing.
If someone breaks one of these laws, then they may get in trouble. Depending on what they did, they could have to pay a fine or even go to jail. However, before someone can be punished for breaking a law, they have to be proven guilty in a court of law.
So, in summary, the law of the United States is like a big set of rules that keeps everyone safe and makes sure that things are fair. There are different types of laws, including those in the Constitution and those made by the government, and if someone breaks a law they could get in trouble.