The children's song "The Wheels on the Bus" presents a charming but physically impossible scenario: a bus that keeps driving forever without ever stopping for gas. This analysis explores the implications of this song from a physics perspective, with a special focus on the concept of perpetual motion. The core of the song is the constant motion of the bus – the wheels going 'round and round' without any indication of an energy source or refueling. This concept immediately raises questions about the laws of nature, especially the laws of thermodynamics.