Okay, so imagine you have a toy truck that you love playing with. You drive it around and have lots of fun with it. But one day, the truck gets old and it starts to break down. No matter how much you try to fix it, it doesn't work anymore. So, you have to say goodbye to it and let it go. That's kind of like what happens when someone goes through parinibbana.
Parinibbana is a big word that means the passing away of a Buddhist monk or nun who has achieved enlightenment, which means they have reached a state of complete understanding and freedom from suffering. It's like they have finished playing with their toy truck and it's time to say goodbye to it.
When a monk or nun goes through parinibbana, it means they have died, but they have also achieved something very special. They have reached a state of peace and happiness that can never be disturbed by anything. It's like they have gone to sleep and will never wake up again, but they are not sad or scared because they have achieved a state of bliss and freedom.
This is why Buddhists see parinibbana as something to be celebrated, not something to be feared. It's like when you finish a really hard puzzle and you feel happy and proud of yourself. The monk or nun has finished the puzzle of life and has achieved something very special that is worth celebrating.
In short, parinibbana is the passing away of a Buddhist monk or nun who has achieved enlightenment, meaning they have reached a state of complete understanding and freedom from suffering. It's like they have finished playing with their toy truck and it's time to say goodbye to it, but they are not sad or scared because they have achieved a state of bliss and freedom.