Mom, the School Flooded!Book - 1996
This is a wacky account of Gus's wet and eventful day: an ocean in the gym, the vice-principal floating by with his goldfish, and fire-engines. Mom can't help saying, "Oh, Gus!" -- but she's enjoying every minute.
After each story, we get a choice: if we think she believed it, we can close the book; if not, we can turn the page! If we don't believe the next stories, we are invited to make up our own. Hilarious illustrations, each kookier than the last, are the perfect accompaniment.