Short summary of Kabumpo in Oz story:
During Prince Pompadore of Pumperdink's birthday celebration a magic scroll is found inside his birthday cake. It warns him that if he doesn't wed a "proper princess" within seven days, his entire kingdom will disappear. The prince, along with the old, wise elephant Kabumpo, the Elegant Elephant, set off on an adventure to the Emerald City and along the way meet up with Peg Amy, a living wooden doll, and Wag, a giant rabbit. Meanwhile Ruggedo the Gnome King (Thompson "corrected" Baum's "Nome") turns himself into a giant while tunneling under the Emerald City, gets Ozma's palace stuck on his crown, and runs off with it.