Drop: An Adventure Through the Water Cycle by Emily Kate Moon (Dial Books for Young Readers, 2021). Watercolor (specifically, India ink mixed with water) seems to be the perfect medium for illustrating the water cycle. In Drop, the author/illustrator emphasizes the eternal existence of Drop as she has cycled through Earth’s atmosphere and surface over her 4.5 billion years. Frontpapers and endpapers show the water cycle and add more details about the water cycle, wonderfully suited to the light-hearted kid tone in the rest of the book.
For young kids, this book can be a prompt for creating a craft with watercolor! Don’t be afraid to add a lot of water to the blue, and then blow air on the creation so the drop blurs on the page. See the book to see how Emily Kate Moon did so.