
Paul grabbed a small piece. He found it lying on the ground. It was flexible and round. He ran to his mom and showed it to her. 
"What is this?" Paul asked.
"It's a penny," his mom replied. "It's a special kind of money."
Paul smiled. He wasn't sure what money was, but he knew he could use it to buy things with it. He pinched it between his fingers and squeezed it hard. His mom laughed. 
"Be careful, sweetheart. The penny is very flexible, but it can break if you pinch it too hard," she said.
Paul smiled and carefully put the penny in his pocket. He was excited to use it for something special.
