Digestion Play -Comedy. Fun Stuff. This is a fun comedy play packed with information that can be used to introduce, teach, or review the terms and concepts of human digestion. Follow our brave News Reporters as they shrink down and travel through the digestive system. I have used this play for grades 3 through 7. Included in this packet: Optional Ending, Staging Notes, Cast of Characters (up to 26), and Vocabulary words.