The third season episode "Doggy See, Doggy Do" features a parody of Sesame Street called "See Samoyed St" with a dog in a Big Bird costume and an Oscar the Grouch equivalent popping out of a hydrant.
Queen Regina of Ka-Larry is named after the show's writers' assistant Regina Calarie.
In "The Road to Ka-Larry," one of the gifts intended for Queen Regina is a rare postage stamp depicting Prince Marcello of Picone (named after production staffer Marcello Picone).
In "Kansas," Aeryn tries to learn to speak English by watching Sesame Street -- specifically, the Muppet & Kid Moment in which Kermit and Joey say the alphabet and she keeps adding "Cookie Monster!"
Arnie, Sid's stuffed dinosaur, is similar in design to Dog from Living with Dinosaurs (albeit much larger and with a horn on his nose).
In the episode "Sid's Amazing Lungs", Gerald pretends to be various characters during playtime; when pretending to be a baby he looks directly into the camera and exclaims "I'm a baby, gotta love me!" with the same style and tone as the baby on Dinosaurs.
While sifting through a box of old objects, Russ pulls out an old Elmo doll.
A piano and guitar amp are branded as "Henson" manufactured.
In the 2021 production, the buildings in Waterville are primarily named after people involved in the original special. These include Hoban Books, Mrs. Marilyn Mink's Music Emporium, the Williams Opera House, and NelsonGoelzHunt Attorneys At Paw. The same building also features the signage "CB & JH."
Upon seeing Old Lady Possum's broken fence, Emmet exclaims "Hubba-wha?" This is a reference to the original special's drum roll bloopers, with "Hubba-wha?" being one of Frank Oz's many improvised exclamations as he and Jerry Nelson performed take after take.
In Volume 1, Irene leaves a note for Toby on the fridge, attached with a Kermit magnet.
In Volume 1, Uncle Traveling Matt appears at the ball and asks Hana if she has any hors d'oeuvres made with radishes.
In Volume 3, The Devils from The StoryTeller episode "The Soldier and Death" appear in a jail cell playing poker with a troll. Their cameo makes a direct reference to their StoryTeller appearance: "Did he say sacked?" "Not again!"