The only episode of this series in which a studio audience is heard laughing and applauding. It is not known whether the show was taped in front of a studio audience or whether or not the audience reaction was "canned".
The crowd in Toyland includes Jack Pumpkinhead and Omby Amby from The Land of Oz (1960), which aired a few months earlier, and also guest-starred Jonathan Winters as a villain.
When he meets the King of Toyland, Uncle Barnaby begins to spout gibberish. Part of his outburst sounds a bit like "nanoo nanoo," the common Orkan greeting from Jonathan Winters' later series Mork & Mindy (1978).