What is in this image? Describe it in Simple English. As plain and simple as possible. No complex words, no long sentences. Still make sure to describe everything in the image.

This image shows a boy riding a fast rocket. The rocket is shaped like a fish. His hat is flying off because he is moving very fast. A dog is running next to him, looking happy. Both the boy and the dog are outside. There is a line behind them that shows they are moving. The background is simple with only a curved line representing the ground.