Once upon a time, there was a jolly frog named Fred. He lived in a swamp with his friends. They liked to play and jump all day long. One day, a new animal came to the swamp. It was big and green. Fred and his friends did not recognize it.
"Hello," said the big green animal. "I am Sam. I am new here. Can I play with you?"
Fred and his friends were scared. They thought Sam might be mean. But Sam just wanted to play. So, they let him join in their games. They played hide and seek, and Sam was very good at hiding.
Then, something unexpected happened. Sam started to change. He became smaller and smaller. Soon, Sam was not big and green anymore. He was a little green frog, just like Fred and his friends. They all laughed and jumped together. Now, they were all jolly frogs in the swamp, and they played together every day.
