Charlie has a red balloon. What will happen if he lets it go?There's only one way to find out... UH OH! Up, up, up it soars - clear up to the moon. How will Charlie get it back? Dad has an idea... but Charlie is the only one who can make it happen.It will take a lot of work and plenty of patience. Can he do it? MOON BALLOON invites young readers to join Charlie as he builds the skills that will take him to the moon to retrieve his red balloon.