One day, a sad dog found a trumpet in the park. He did not know how to play it. He tried to blow, but no sound came out. He was very sad and wanted to play the trumpet.
A little girl saw the sad dog and walked up to him. She said, "Why are you sad, dog?" The dog showed her the trumpet. The little girl knew how to play the trumpet. She told the dog, "You need to rub it first, then blow."
The dog rubbed the trumpet and then blew into it. To their surprise, instead of a sound, colorful bubbles came out! The sad dog was now a happy dog. He loved the bubbles and played with the little girl all day. They laughed and played with the magical trumpet, making more and more bubbles.
