Gerald the elephant and his friend Piggie are outdoors and ready to play when a drop of rain falls “PLINK!” on Piggie’s head. Watching her high-spirited mood dive precipitously through annoyance toward despair, Gerald extends an ear to shelter her. Soon, though, two ecstatic worms cavorting in the rain inspire them to find happiness in wet-weather play. The characters quickly shifting moods provide plenty of laughs, as well as food for thought, in this amiable entry in the Elephant and Piggie beginning-reader series.