Central Idea of a Children's Story

Read the following excerpt from a children's story:

Once upon a time, in a lush green forest, there lived a wise old owl who loved to share stories with the other animals. Each evening, the animals would gather around the great oak tree, eager to hear the owl's tales of adventure and friendship. The owl taught them about the importance of kindness and helping one another, no matter how big or small they were.

What is the central idea of this passage?