Mo is going swimming in the fifth title of the perenially popular, Geisel Award-winning Level 2 readers series by David A. Adler! It's Field Day at summer camp and Mo's group, the Guppies, is competing for extra ice cream! He and his friends are doing their best at everything from the three-legged race to the potato sack race, and as the day nears its end, each group has won one medal each. It's all on Mo to break the tie in the final event: swimming!