There is some hokey dialogue that is completely there for the adults and as I said, a big ol' deus ex machina, but overall - a super cute little book that young ones will love. I'd recommend it for preschoolers (or in my son's case, nearly preschoolers). It's the perfect length for little ones who are just starting to get the patience to sit for more than 2 minutes and listen to longer stories.
"Cloudette" by Tom Lichtenheld was just published this month by Henry Holt & Co. It is available in hardcover.