Once upon a time, there was a bright sun up in the sky. It was so bright that all the kids loved to play outside. Under the bright sun, there was a small cell. In that cell, lived a tiny bug named Billy.
One day, Billy found a big, bright ball. He loved the ball so much that he wanted to play with it all the time. But, the ball was too big for his cell. So, Billy had a smart idea. He would replace the big ball with a small ball that could fit in his cell.
Billy went to find a small ball. He looked and looked until he found the perfect one. He was so happy! Now, Billy could play with his new small ball in his cell. And, under the bright sun, Billy and his friends had lots of fun playing with the small ball.
