Moonbeam Award Winner The four seasons bring all sorts of weather, and Willy and Lilly adventure through it together. Join this dynamic duo and their adorable pets as they learn why the days get shorter in the winter, how the weather changes with the seasons, and what weather forecasts can tell us (like when it's best to play inside!). Written by a meteorologist, this delightfully illustrated text presents challenging scientific concepts in a kid-friendly fashion and even includes a glossary of weather words perfect for extending the story for young readers.