Seuss licensed App. Dr. Seuss Properties ™ & © 2018 Dr. Seuss Enterprises, L.P. All rights reserved. Join Yertle the Turtle, king of the pond, in this interactive app as he commands the other turtles to stack themselves beneath him so that he can see further and expand his kingdom. Explore pictures, learn new vocabulary, and personalize the story with your own narration. Find out what happens when Mack, the turtle at the bottom of the pile, decides that he has had enough!