Kid!Arthur/Merlin: A Prince and his Sorcerer
At some point during their mythical creature hunting, Mehwin asks Arfur why he can't have a crown like his. And Arfur says that only pwinces are allowed to wear crowns, and that Mehwin is his sawswawa (sorcerer), and swawswawas can't have crowns and must wear measly paper hats because he says so.