I really enjoy the work of Anne Jonas... "Round Trip" being one of my all-time favorite books. Her books are so clever, appearing simplistic, based on the text, but revealing much more complex concepts upon digging in, and "Splash" is no exception. This book featured higher-level math concepts for beginning readers, and allowed listeners to get involved in the story, either by counting or opting to the follow the story word-problem, adding and subtracting the animals as they enter and exit the pond. Excellent!