

Mia and Ben were best friends. They liked to play and joke with each other. One day, they found a big box in the park. It was brown and had a lock on it. Mia and Ben wondered what was inside.
"Maybe it is a treasure!" Mia said.
"Or a monster!" Ben said.
They tried to open the box, but it was too hard. They needed a key. They looked around, but they could not find one.
"Let's go and ask Mom for help," Mia said.
"OK, but first, let me tell you a joke," Ben said.
He whispered something in Mia's ear. Mia laughed.
"That is funny!" she said.
They ran to Mia's house, where Mom was waiting for them. They told her about the box and asked her for a key.
Mom smiled. She had a mysterious style. She wore a hat and a coat and had a big bag.
"I have a key for you," she said. "But first, let me tell you a secret."
She whispered something in Mia's and Ben's ears. They gasped.
"That is amazing!" they said.
Mom gave them the key and they ran back to the park. They unlocked the box and opened it. Inside, they found a lot of toys and books and candy.
"Wow!" Mia and Ben said.
They looked at Mom, who was behind them. She winked.
"Surprise!" she said. "This is a gift for you. I put the box here this morning. I wanted to make you happy."
Mia and Ben hugged Mom. They thanked her and told her they loved her.
They played with the toys and books and candy. They shared them with each other. They also told each other the joke and the secret that Mom had told them. They were very happy. They had the best day ever.
