Vinaya Piṭaka is like a rule book for Buddhist monks and nuns. Just like you have rules to follow at school or at home, monks and nuns also have rules to follow in their daily lives. These rules are called "Vinaya" in Buddhism.
In the Vinaya Piṭaka, there are many rules about how monks and nuns should behave and treat each other. Some of the rules are about respecting elders, being honest, and not stealing. Other rules are about how to dress, how to eat, and even how to use the bathroom!
The Vinaya Piṭaka also includes stories and teachings by the Buddha that relate to how monks and nuns should live their lives. These stories and teachings help the monks and nuns understand why the rules are important and how they can lead a good and peaceful life.
Overall, the Vinaya Piṭaka is an important guidebook for Buddhist monks and nuns to follow so they can live a life of discipline, respect, and compassion.