Alfie is crazy about space. His favourite things are: 1. aliens, 2. rockets, 3. the moon – in that exact order. When his new sister comes along, he notices that she looks a bit funny, she talks funny and sometimes she smells and he realizes . . . she MUST BE AN ALIEN! Alfie decides that baby Ruby would appreciate a visit ‘back home’ and takes her by rocket to the moon, where the pair have a tea party with the cute (baby-like) aliens who live there. When it’s time to go home, Alfie feels sad to leave his sister, so they both set off back to his cosy bed at home for a cuddle. Alfie decides that Ruby is even more special to him than aliens, rockets and the moon.