No joke, the old Nickelodeon Universe area at Kings Island (back in the days of Paramount ownership) was actually very well-executed, especially for a regional park. They had a "Runaway Reptar" family inverted coaster, along with a solid flume ride themed to the Wild Thornberries (among other attractions). Ironically, Spongebob sort of got shafted, only getting a (admittedly nice) Bikini Bottom water play area.