Okay kiddo, so there's this thing called evolution. It's the idea that living things have changed over a very, very long time, like many, many years.
In Kansas, some people didn't like the idea of evolution being taught in schools. They wanted schools to teach something called Intelligent Design, which is the idea that a super powerful being designed and created all living things.
But there was this guy named Charles Darwin who came up with the theory of evolution after studying a lot of animals and plants. He said that living things change over time because of a process called natural selection, which means that the strongest animals or plants survive and pass on their good traits to their babies.
So some people in Kansas didn't like Darwin's ideas and wanted schools to teach Intelligent Design instead. But a court said that you can't teach religious ideas like Intelligent Design in public schools because it's against the law.
So in the end, schools in Kansas are still teaching about evolution and Darwin's ideas, because that's what science shows us is true.