Katie's Happy Corner presents The Important Little Cloud. It is intended to help young children understand the water cycle. Conversation among the "little drops" clarifies terms such as "evaporate" and "invisible" as they float higher until they "condense" and become a cloud. Little Cloud soon connects with other clouds that are going to "precipitate" - they explain to Little Cloud that the word means they're going to "rain." Little Cloud is afraid that if he rains, he'll disappear forever, b