Join Jet Propulsion and his friends as they celebrate Earth in this Level 2 Ready-to-Read based on a popular episode of PBS's hit show Ready Jet Go!When Jet learns that humans celebrate Earth Day, he can't help but wonder, why can't every day be Earth Day? After he takes his friends for an amazing ride around the world in his flying saucer, they feel the same way! This Level 2 Ready-to-Read includes bonus back matter content with lots of fun facts about the Earth and Earth Day. © Copyright 2020 Jet Propulsion, LLC. Ready Jet Go! is a registered trademark of Jet Propulsion, LLC.