Once Upon A Cloud Author:Rob D. Walker "What are clouds made of, and why do they float? Are skies the water and clouds the boat?" From cotton candy that melts in your mouth to comfy cushions where birds take their naps, clouds take on many shapes in our imaginations. This whimsical picture book by newcomer Robert Walker and acclaimed illustrator Matt Mahurin takes young readers ... more »on a fantastic journey through the skies, leading them eventually to sleep: "I know what they are, I've figured it out. Clouds are just dreams that wander about . . ."« less