When Sarah and her younger brother Charlie go to stay with their grandparents, it rains for days. At first, they have fun exploring inside the big, old house, but eventually they want to explore outside, too. “Where does the rain come from?” Sarah asks her grandfather, Big T. He promises to show her once it stops raining.

When the storm passes, Sarah, Big T., Charlie and Keeper the dog go exploring. They jump in puddles, draw a puddle map and finally find the biggest puddle in the world!

Mark Lee’s lively story is an introduction to the water cycle for young readers. Nathalie Dion’s soft illustrations show the fun, loving relationship between Big T., Sarah and Charlie.

莎拉（Sarah）和她的弟弟查理（Charlie）去爷爷奶奶那里住时，下了好几天雨。最初，他们在古老的大房子里探索，玩得很开心。但最后他们也想探索外面的世界。“雨从哪里来？” 莎拉（Sarah）问她的祖父Big T.。他承诺一旦雨停了就告诉她。

暴风雨过后，莎拉（Sarah），Big T.，查理（Charlie）和看门狗开始了探索。他们跳入水坑，绘制水坑地图，最后找到了世界上**的水坑！