Szinetr Dra s Bereczki Zoltn jra sszell The Thunder Egg:. Ages: 5 and upA terrible drought was threatening to wipe out Stands by Herself's Cheyenne people. One day, all alone on the Great Plains, she came upon a strange egg shaped rock, and took it home. "That looks like a thunder egg!" her grandmother said. Laid by the great Thunderbird's wife, could Stands by Herself's mysterious rock hold the key to her people's survival? The Thunder Egg is the story of a girl's coming of age, when she realizes that life can require us to think of others before ourselves and to follow what our hearts tell us.