Okay kiddo, Romans 12 is a part of a really old book that talks about important stuff. In this chapter, a man named Paul wrote about how we should treat each other. He said that we should be nice to people and not think we are better than anyone else. We should work together and use our talents to help others.
Paul also talked about how we should love others, even if they don't treat us nicely. He said that we shouldn't get revenge if someone hurts us, but instead, we should bless them and try to be friends with them.
In the end, Paul said that if we follow these rules, we will live a happy life and make the world a better place. So, basically, Romans 12 teaches us to be kind, humble, and loving towards everyone, no matter what.