Abhidhamma Piṭaka is like a big book that explains how our minds work and how we can be happy. Just like you have a body, you also have a mind. Your mind is like your brain and it helps you think, feel and learn new things.
In the Abhidhamma Piṭaka, there are many stories and examples that explain how our minds work. For example, imagine you have a toy car that you really like. When you play with it, you feel happy and excited. This is because your mind likes the toy car and it releases happy chemicals that make you feel good.
But when a friend comes over and wants to play with your toy car, you may feel angry or sad. This is because your mind doesn't want to share the toy car and it releases unhappy chemicals that make you feel bad.
The Abhidhamma Piṭaka teaches us how to be aware of our thoughts and feelings and how to control them. It helps us learn how to be kind to others, how to be happy with what we have and how to let go of things that make us sad or angry.
So, just like you learn new things in school, reading the Abhidhamma Piṭaka can help you learn how to be a good and happy person.