This is a sweet book that teaches children that they are all unique and they shouldn't make fun of someone for being different. When the duckling was born, he got made fun of for a whole year for being "ugly". After that year, the duckling grew into a beautiful swan! I think the intended audience for this book is 2nd or 3rd grade, when children are starting to notice other children and their differences. I would use this book to teach my students that everyone is different in some way and you should never make fun of someone for being different than you.