A Magical Kingdom is a repeatable quest in Nuka-World.
To secure the Kiddie Kingdom for the raiders, the Sole Survivor needs to find a way to clear the area of the radioactive mist that lies over it.
- Enter Kiddie Kingdom to find out that it's covered in radioactive mist and meet Oswald the Outrageous, the current tenant. To claim the area, you need to both flush him out and eliminate him, and shut down the radiation sprayers.
- To flush Oswald out, you need to clear three locations: The Fun House, King Cola's Castle (fighting him in the theater), and the employee tunnels accessible through the Nuka-Racers tunnels.
- At this point, he will taunt you and demand that you meet him at the King Cola's Castle rooftop for a final showdown.
- Here, you have two options: Fight and kill him or convince him to leave through difficult persuasion checks. Alternatively, having Rachel's holotape allows for instantly talking him down.
- Once the problem is solved, hoist the flag!