The little elephant wants to know how long he can stay with his mother. "It's still a long time," answers Mama Elephant. The little elephant is silent for a while. Then he asks, "Yes, but how long is long, actually?" And Mama Elephant has plenty of examples. But none of them are long enough for the little elephant. Until Mama Elephant comes up with the longest thing of all. And that really is a very, very long time...