One day, a big steel box was found in the park. No one knew what was inside. It was an unknown thing. The kids in the park were very excited to see the big box. They all wanted to know what was inside.
A little boy named Tim said, "Let's hurry and open the box!" The kids all pushed and pulled, but the box would not open. They tried and tried, but it was too hard.
Then, a little girl named Sue had an idea. "Let's ask the big dog to help us!" she said. The big dog came and used his strong teeth to open the box. Inside the box, they found a lot of colorful balloons. The kids were very happy and played with the balloons all day.
