One day, a pretty girl named Lily went to the park. She saw a big seat under a tree. Lily ran to the seat and sat down. She saw a small box on the ground next to her.
A boy named Tom came to the park too. He saw Lily on the seat and said, "What is in the box?" Lily said, "I don't know. Let's open it!" They kneeled down to open the box.
Inside the box, they found a key. They looked around and saw a small door in the tree. They used the key to open the door. There was a surprise party for them inside the tree! All their friends were there. They had a great time at the party.
