When hippopotamuses come to live at the elephants' river, Elmer finds out why they have come and enlists his friends to help them make things better.

Once a year on Elmer's Day, all the elephants decorate themselves and have a parade, and this year Elmer comes up with a plan to include the other animals as well as the elephants.

Elmer the elephant visits with his Grandpa Eldo and they have great fun trying to remember all the things they used to do together.

Elmer the patchwork elephant finds many things interesting during his walk, but cannot persuade any other animals to stop and enjoy them with him.

Elmer, Wilbur, and three friends find a kind of palace in the jungle. The others think that the famous lost treasure must be inside, so they race around looking for it. Only Elmer the patchwork elephant and his cousin Wilbur have noticed the real treasure.

"When Rose meets Elmer, the patchwork elephant, she's humming a tune that she just can't get out of her head. When she leaves, Elmer realises he can't get the tune out of his head either-- and as he crosses the jungle he can see the infectious tune spreading to every animal Rose has met! Can Elmer help everyone get rid of it?"