Well, sweetie, Poland is a country that is part of a group of other countries called the European Union (EU). Being part of this group helps Poland work together with other countries to make important decisions about things that affect all of them, like trade, security and laws.
Now, some people in Poland are not very happy with some of the rules that come with being part of the European Union. They think that the EU is too bossy and they don't want to follow all of their rules.
However, leaving the EU is a big decision that would have a lot of consequences, some good and some bad. Right now, Polish leaders and people are discussing this possibility and trying to decide what is best for the country. But it's not as simple as just packing up and saying bye-bye. There are a lot of things that need to be sorted out, like trade agreements, border control, and many other important things. So, it's a complex issue that needs a lot of careful thought and planning.