* AccidentalInnuendo: Coochie and Coo's names are based on "[[BabyTalk coochie coo]]". This isn't a problem... except the ''girl'' twin is named Coochie, and "Coochie" by itself is slang for ''vagina''.
* AllAnimationIsDisney: The show aired on [[Creator/DisneyChannel Playhouse Disney]] in the United States, and was promoted on the same level as the shows that Disney actually produced. In addition, Disney distributed the home media releases of the show in the US when it was airing, and included it as part of their "Playhouse Disney Live" shows at [[Ride/DisneyThemeParks their theme parks]] alongside Olie, Zowie, and Billy being meetable characters during the 2000s. However, Disney did ''not'' produce the show, it was actually produced by Creator/{{Nelvana}} in Canada, who are the show's actual owners. Adding fuel to the fire is the announcement that the show would be added to Creator/DisneyPlus in September 2021.
* JerkassWoobie:
** Screwie. He’s definitely rather abrasive and can be insensitive towards Olie and the others, but “Orb’s Well that Ends Well” shows that he’s actually quite sad and worried about how others will see him due to his weird shape. It’s quite easy to feel sorry for him when he expresses his insecurities to Mrs. Triangle, and her being sympathetic towards him makes it all the more satisfying.
** Gloomius Maximus before his HeelFaceTurn. As much as he despises anything positive like fun and happiness, it’s hard not to want him to get some of it, as he’s lived an entire life of dreariness and negativity.
* {{Narm}}: The SkywardScream in "It's a Roundiful Life". '''"WHAT ABOUT MEEEEEEEEEEE!!!!???"'''
* NightmareFuel: Gloomius Maximus' first appearance, ''The Great Defender of Fun''. He was basically a kid-friendly version of the Dementors from ''Franchise/HarryPotter'', a pirate who sucked the fun and happiness out of any living creature and object. His home, the Galaxy of Gloom is just as creepy. It doesn't even look like a galaxy, but more like a black hole sucking in frowning planets, moons, stars and suns.
* RetroactiveRecognition: Young Uncle Gizmo is voiced by then-unknown Creator/MichaelCera.
* SugarWiki/SweetDreamsFuel: While there are obviously conflicts (there wouldn't be a show without them), the show doesn't have a cynical bone in its body. It's just an innocent series about imaginative, fun-loving kids being imaginative and fun-loving, all living in a literal world that accommodates them.
* SweetnessAversion: On the other hand, for some, the show's seemingly perpetual joy can be a little overbearing, ''especially'' the '20s-style ragtime music, which can feel like outright forced fun.
* UnfortunateCharacterDesign: Gloomius Maximus has a faint, reddish dripping stain on his chin. While it's likely meant to be either rust or the red paint on his lips leaking, it ends up looking almost like a bloodstain.
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