One day, a boy named Tim went for a walk. He saw a dark cave. Tim was scared, but he wanted to see what was inside. He took a deep breath and went in.
Inside the cave, he found a big missile. Tim did not know what it was, but it made him smile. He thought it looked like a big toy. Then, he heard a voice say, "Hello, do you like my missile?"
Tim looked around and saw a friendly robot. The robot said, "I am Rob, and this is my missile. I use it to help people." Tim smiled again and said, "I like your missile, Rob. It is big and dark like the cave."
Rob and Tim became good friends. They played with the missile and had fun in the dark cave. From that day on, they always smiled when they saw each other.
