"How the Camel Got His Hump" from Just So Stories by Rudyard Kipling describes the humorous story of how the lazy Camel gains his hump. This is a perfect story for teaching a lesson about working hard and helping others.
Just So Stories - How the Camel Got His Hump Summary
Camel, O Camel, come out and trot like the rest of us.
"Presently there came along the Djinn in charge of All Deserts, rolling in a cloud of dust, and he stopped to palaver and pow-wow with the Three."
That's your very own humph that you've brought upon your very own self by not working.
The world is new and the animals are just beginning to work for the man. The Camel stays out in the desert and does not work. The Dog, Ox, and Horse all ask the Camel to work, but the lazy Camel always says, "Humph" and refuses.
Man tells the Horse, Dog, and Ox that they have to work extra because the Camel won't work. The three animals are upset and they tell the Djinn (person in charge of all deserts) that the Camel has not worked for three days. The Djinn decides to go into the dessert to talk to the Camel about working.
The Djinn asks the Camel why he will not work. The Camel says, "Humph". The Djinn casts a spell and gives the Camel a giant hump on his back. The Camel asks how he will work with the hump, and the Djinn says he will be able to live off his hump for 3 days, and that he has to catch up on the work he has missed.