The Ironboy

Lots of people thought the Ironboy would want to be human, but they were wrong. He was content to remain the way he was. After all, in his metallic form, he dived into the Marianas trench and touched the bottom, flew into space and landed on Mars, travelled to both poles and had many, many more adventures. Even though he rusted away and never grew beyond, he was content, and he just sat in the park until he corroded away, waiting to see the end of humanity.