The Four Frogs: An Increasingly Numerical Tale (Hardcover) (ISBN-13: 9798889132288)

This is a book, where every verse contains a number; the numbers get bigger and bigger with every verse. The tightly-rhymed story follows four frogs, whose pond has become too slimy. They go off on an adventure, and with the assistance of their bird friends, they are able to replace the water in the pond.