In stories featuring the hippo friends, George tries to impress Martha with fibs of his exploits, Martha's research causes her to itch, and Martha must find a way to get George to join her on a picnic.

A new family of hippos stirs up the neighborhood.

A young hippopotamus shows his father the right way to do things, such as getting dressed, watering the flowers, and especially giving big hugs.

It looks like trouble when Fragility, a hippopotamus whose feelings are easily hurt, meets Rudy, a rude elephant, on the soccer field.

Daddy tries to get Bertie, a young hippopotamus, to go to bed, but Bertie is restless and wants to play instead.

When the elephants complain to Elmer that the river is over-crowded, Elmer sets off to see what he can do.

Relates several episodes in the friendship of two hippopotamuses.

While going on a picnic together, Herbert Hippo teases Tess Tiger about all of the things she has brought along, until he learns just how important they can be.