Once upon a time, there was a boy named Tim. Tim loved to swim in the big blue pond near his home. One day, when Tim went to swim, he saw a frog. The frog was green and had a sour face.
"Hello, Mr. Frog," Tim said. "Why do you look so sour?"
The frog replied, "I am sad because I want to write a letter to my friend, but I do not know how to write."
Tim thought for a moment and then said, "I can help you write the letter, Mr. Frog."
So, Tim and the frog sat by the pond. Tim helped the frog write a nice letter to his friend. After they finished, the frog's face was not sour anymore. He was very happy and thanked Tim. They both went for a swim in the big blue pond and became good friends.
