Codename: Kids Next Door, commonly abbreviated to Kids Next Door or KND, is an American animated television series. The fourth season opens with Numbuhs 2 and 5 traveling through the school jungle gym to help find the First Grade’s missing pet bunny, Mr. Fluffalupagus from Heinrich von Marzipan who kidnapped him and plans on making chocolate bunnies from real bunnies by dipping them into the chocolate volcano.