From Kid Robot. Kang and Kodos have returned! The newest entry in Kidrobot x The Simpsons Treehouse of Horror features everyone's favorite Rigellians in enamel pin form with The Simpsons Treehouse of Horrors Kang & Kodos Enamel Pin 2-Pack. Packaged together, these deluxe 2 1/2" enamel pins have adjustable arms and fasten securely to jackets, bags, and more.