Okay kiddo, you're learning about third rail politics. Do you know what trains are? Great! Do you know how they run? They run on something called a "rail," which is like a track for the train to follow.
Now imagine if there was a third rail added to the train tracks. This rail is very dangerous and if you touch it, you could get hurt or even killed.
When we talk about third rail politics, we don't mean a physical rail, but a dangerous topic that politicians try to avoid because it's so controversial. It's like if there was a topic that people feel very strongly about, and no matter what you say, someone will always be upset.
So, politicians might avoid talking about this topic to try and keep people happy and not upset anyone. They might fear that if they talk about it, it could harm their chances of being re-elected or cause a lot of problems.
Overall, third rail politics is a dangerous topic that politicians try to avoid to keep people happy and protect their position. Does that make sense, kiddo?