The Hare was once boasting of his speed before the other animals. “I
have never yet been beaten,” said he, “when I put forth my full speed.
I challenge any one here to race with me.”

The Tortoise said quietly, “I accept your challenge.”

“That is a good joke,” said the Hare; “I could dance round you all the
way.”

“Keep your boasting till you’ve beaten,” answered the Tortoise. “Shall
we race?”

So, the animals chose a path for the race. The Hare darted almost out
of sight at once, but soon stopped and, to show his contempt for the
Tortoise, lay down to have a nap. 

The Tortoise plodded on and plodded on, and when the Hare awoke from his nap, he saw the Tortoise just near the winning-post and could not run up in time to save the race. Then
said the Tortoise:

Plodding wins the race.

The classic tale with a simple moral about patience and perseverance for children.

The Hare and the Tortoise