Identifying the Author's Tone of Friendship

The following passage is an excerpt from a story that explores the importance of friendship:

In the vibrant town of Colorville, friends were like the colors in a rainbow; each one added to the beauty of the whole. Every day, the children of Colorville played together, their laughter ringing through the streets like the sweet melodies of a song. But one day, a new girl named Sarah arrived. She was shy and hesitant, standing on the sidelines as the others played. Timmy, the town's most outgoing boy, decided to approach her. "Why don't you join us?" he asked with a warm smile. Sarah looked at him, her eyes shining with nervousness. "I don't know how to play any of your games," she whispered. Timmy knelt beside her, saying, "That’s okay! We can teach you. Everyone has their first day, and we were all new once. It’s much more fun together!" As Sarah began to join in, the whole group burst into laughter, realizing that with every new friend, life became more colorful.