It's Mine! by Leo Leoni
Three selfish frogs live together on an island in the middle of Rainbow Pond. All day long they bicker: It’s mine! It’s mine! It’s mine!
But a bad storm and a big brown toad help them realize that sharing is
much more fun. With characteristic clarity, simplicity and exuberance,
Leo Lionni makes it possible for kids to see themselves through the
antics of others who share our world.
Leo Lionni is an artist, designer, sculptor and author of chldren's books. I love reading his stories and much more I love the illustrations. In this story he tells us about the benefits of sharing.
Here's some great animation I found on Vimeo: Cornelius (1986), Frederick (1986)
and Fish is Fish.
and