A story-poem about the activities of such unusual animals as the Nook, Wump, Yink, Yop, Gack, and the Zeds

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

The King, tired of rain, snow, sun, and fog, commands his magicians to make something else come down from the sky, but when oobleck falls, in sticky greenish droplets, Bartholomew Cubbins shames the King and saves the kingdom

Rhyming verses catalogue a profusion of amusing, unusual, imaginative, and incredible things that can be thought about.