Once upon a time, there was a clever little dog named Max. Max loved to play with his ball. He would run and jump, and his friends would laugh and clap.
One sunny day, Max saw a big stair. He thought, "I want to play on the stair!" So, Max ran to the stair with his ball. He put the ball at the top of the stair and let it roll down. The ball went "bump, bump, bump" all the way to the bottom.
Max's friend, a little girl named Lily, saw him playing on the stair. She said, "Max, that looks fun! Can I play with you?" Max wagged his tail and barked, "Yes, let's play together!" So, Max and Lily played on the stair all day long, laughing and having fun. And they lived happily ever after.
