The Impatient Turtle — Janette Oke

Pogo had one goal in life--to have fun. New thrills, new excitement, he wanted it all.
But Pogo also had a problem. Because he was a turtle, he couldn't do most of the fun and exciting things he saw those lucky boys doing who visited his pond. And this made Pogo very angry.
Angry, that is, until he discovered why he was made like he was. Then, being a turtle didn't seem so bad.
In fact, it was kind of special.