Once upon a time, there was a little dog named Spot. Spot was a very careful dog. He liked to play with his friends in the park.
One day, Spot found a big red ball. He wanted to play with it, but it was tied to a tree. Spot tried to untie the ball, but the knot was too tight.
Then, a nice girl named Ann came to help. Ann was very good at tying and untying things. She carefully untied the knot and set the ball free. Spot was very happy and played with the ball all day long.
