And Now For Something Completely Different: They seemed to try just this every few years or so. For example, after a string of high-concept fantasy series, but the mid-1970s, they made a transition to producing campy variety series; this lasted up through the 1980s, when they made another switch to more comedy-based programs.
Author Avatar: The second season of DC Follies featured puppet caricatures of Sid and Marty, who were usually featured during the episode's closing, either arguing with each other, or bantering with the other puppets.
Bad Bad Acting: Many of the Kroffts' later shows suffer from this. The Krofft Supershow alone is chock-full of it.
Big Damn Movie: Pufnstuf (1970), Land of the Lost (2009) - interestingly, both were handled by Universal (which had nothing to do with any of their series); supposedly reboots of Pufnstuf, Lidsville, and Sigmund are in the works, with different studios, including DreamWorks and Sony.
The Cast Showoff: Most Krofft shows have at least one character or actor who falls into the category.
Cool Car: A number of them in various series, but Schlepcar (aka Wonderbug) probably tops the list.
Laugh Track: When the Kroffts brought on veteran producer Si Rose to help them with H.R. Pufnstuf (and he eventually executive produced a majority of their earlier shows), Rose persuaded them to use a laugh track, reasoning that a funny show without a laugh track was a handicap. The Kroffts were skeptical at first, but eventually agreed, and as such, most Sid and Marty Krofft productions (save for both versions of Land of the Lost, since they were more dramatic) contain one.
DC Follies alone takes it up a notch, as the entire cast of the show (aside from Fred Willard as himself) were life-sized puppet caricatures of politicians and celebrities who were in the news at the time.
The Revival: They've had many attempts at reviving their own work for newer generations, but haven't been too successful at it. Only two revivals of Land of the Lost saw the light of day (a new series in 1992, which wasn't as successful as the original, and the Big Damn Movie of 2009, that was a trainwreck); throughout the 2000s, new versions of ElectraWoman & DynaGirl and Family Affair were in the works (the latter they had nothing to do with the original, but had obvious connections with castmember Johnny Whitaker), and presently, movie remakes of H.R. Pufnstuf, Lidsville, and Sigmund And The Sea Monsters are in the works.
Shoot the Money: Mainly because networks gave them rather small and meager budgets, while their characters and settings cost millions of dollars to create.
Word of Dante: Many have said that the Kroffts sued McDonald's for ripping off H.R. Pufnstuf with their McDonaldLand concept, when this is actually false. In a 2000 interview for the Archive of American Television, Sid and Marty said that McDonald's commissioned them to create a McDonaldLand for their commercials, which they began doing, then halfway through the creating process, McDonald's told them they decided to pull the plug on the project, so the Kroffts stopped their art department, and that was that... until the McDonaldLand commercials began popping up on television a few months later, without the Kroffts' knowledge, which led to the lawsuit.
You Look Familiar: The Kroffts had a tendancy to use some of the same actors in various different shows of theirs. For example:
Billie Hayes played Witchiepoo in H.R. Pufnstuf, then later played Wenie the Genie in Series/Lidsville.
Lennie Weinrib did a number of character voices (most notably Pufnstuf) and also played the titular Magic Mongo from The Krofft Supershow.
Jack Wild was immortalized as Jimmy from H.R. Pufnstuf, but he also portrayed himself in the special The World of Sid & Marty Krofft at the Hollywood Bowl and an episode of Sigmund And The Sea Monsters.