Okay kiddo, so you know how in the United States we have three branches of government – the President and his people in the White House make the laws and get things done, the Congress (that’s a big group of people who represent all the states) approves the laws and makes sure everything is fair, and then there are the courts who make sure everyone follows the laws that were made.
In 1789, when the United States was first starting out, they needed to set up the court system. They did this by making a law called the Judiciary Act of 1789. This law said that there would be three levels of courts – district courts (kind of like the little baby courts), circuit courts (like the middle-sized courts) and the Supreme Court (the big boss court).
The district courts would handle the small cases in each state, like if someone got into a fight or stole something. The circuit courts would move around to different parts of the country to handle larger cases, like if someone broke a really big law or if people from different states were fighting. And the Supreme Court would be like the ultimate court that could overrule any decision made in any of the other courts if they thought it wasn't the right decision.
The Judiciary Act of 1789 was important because it helped set up the court system in the United States, making sure that everyone could get a fair trial and that the law was followed. It’s still an important law today!