A city of Whos on a speck of dust are threatened with destruction until the smallest Who of all helps convince Horton's friends that Whos really exist.

Piggie ruins a perfectly good day by telling Gerald the elephant that she is going, sending him into a panic.

"Piggie really likes slop. She likes it so much, she wants Gerald to try some! But can Gerald find the courage to do it? Or will the smell alone be too much to handle?"-- Loving slop, Piggie offers some to Gerald, but he has trouble trying any, with even the smell being too much to handle.

Elephant Gerald and Piggie want to go for a drive, but as Gerald thinks of one thing after another that they will have to take along, they come to realize that they lack the most important thing of all.

When Elephant accidentally breaks Piggie's new toy, they both experience intense feelings before coming to realize how important their friendship is.

When a lazy bird hatching an egg wants a vacation, she asks Horton, the elephant, to sit on her egg--which he does through all sorts of hazards until he is rewarded for doing what he said he would.

Piggie tells Gerald she has a surprise for him, but it is not there yet, so Gerald must be patient.

Gerald is tired and cranky and wants to take a nap, but Piggie is not helping.

When Gerald the Elephant is sad, Piggie is determined cheer him up, but finds after many tries that it only takes the simplest thing to change Gerald's mood.