The Ugly Duckling Dinosaur: A Prehistoric Tale by Cheryl Bardoe, illustrated by Doug Kennedy is a first-rate version of the Ugly Duckling Fairytale.
The illustrations were done in watercolors; there is an artist's note and an author note in the back.
I would use this title with Preschoolers to 3rd grade. This would go with a theme of oviparous animals, ducks, various 'Ugly Duckling' stories, and dinosaurs.
This book will be welcomed by the dino-lovers out there!