What does Milo begin the gurny to Dictionopolis?

Milo begins the journey to Dictionopolis after discovering a mysterious tollbooth in his room. Driven by boredom and curiOSity, he decides to drive through it, leading him to the fantastical land where Words and language are celebrated. The adventure to Dictionopolis symbolizes his quest for knowledge and understanding in a world he initially finds dull and uninteresting.