Martha is tired of being in the middle - until a frog points out its benefits - in a funny story sure to have middle siblings feeling on top of the world. Being in the middle is no fun for Martha. She gets squashed between her siblings when they argue. She never gets called "big and sensible" or "cutesy-wootsy." Sometimes she even feels invisible. One day she gets so fed up, she decides to run away. Luckily, Martha meets a wise frog who points out...