Fiona has no time today -- not even to go to the bathroom. She is in a big hurry to show off the volcano she and Felix made for show-and-tell. Just as the volcano erupts . . . oops! If only she had stopped to use the bathroom when she needed to! Fiona believes that everyone will laugh about her accident for the next fifty years. But with the help of Felix, her teacher Miss B., and a classmate's trick goldfish, Fiona learns that little accidents are quickly forgotten.