[2][3] The book opens with an explanation of how people in the Kingdom of Didd still talk about "the year the King got angry with the sky".

Throughout the year, the king of Didd, Theobald Thindner Derwin, gets angry at rain in spring, sun in summer, fog in autumn, and snow in winter because he wants something new to come down from the sky, but his personal advisor and page boy, Bartholomew Cubbins, is a bit too uncomfortable to agree with it.

That evening, the magicians make the substance at their cave at Mystic Mountain Neeka-tave and release it into the atmosphere.

A much-more confident Bartholomew scolds the king for ignoring him in favor of the falling Oobleck and making such a foolish wish, and he tells him to apologize for the mess his wish has caused.

Immediately after the king says those simple words in tears and sobs, "I'm Sorry", the Oobleck storm disappears and the sun melts away all the green slime.

Israeli rock-opera for children "Gedaliyahu ve-ha-mistuk" (1982) composed by Gary Ekstein is based on Dr. Seuss' book.