There was famine in the animal kingdom, but there was plenty food in heaven above. Tortoise and the other animals were invited to a feast.

Tortoise begged for feathers from the other animals. He told the animals that they all needed new names for the feast

Tortoise then said, his name was all of you

When they arrived at the feast, they were given a lot of food

Tortoise ate all the food alone, which made the other animals very angry

They collected their feathers from Tortoise and Tortoise didn't know how to return back from the foreign land

Tortoise told the animals to tell his wife to bring out all the soft materials in his house to enable him jump down from up

Tortoise saw his wife putting down things, he didn't know that the animals had told his wife to bring out hard things in the house

He jumped from up and scattered into pieces. That is the reason behind tortoise having uneven shells