I love Oliver Jeffers' stories and read them to my students often. De vuelta a casa is no exception. This cute story is about a little boy who gets stuck on the moon with a martian. They figure out how to fix their ships and eventually are able to return home. Their method of escape from the moon is humorous and downright cute. With this book you can introduce some of the main vocabulary by making card to play Go Fish or Memory. See here for an example from one of Jeffers' other books.
lunes- la Luna