A cute little blond moppet and his dog see the circus parade and rush off to the circus' entrance, where Barker Bill describes the wonders that lie within, evoking their images.
Like many Terrytoons, this is too cute for me to enjoy, although the cartoon is certainly competently directed by Connie Rasinski, with nicely timed and executed gags in candy-box style Technicolor.
In terms of cartoon history, this is the introduction of Barker Bill, who shills for the circus. Barker Bill was used by Terry for his first foray into television in 1953, to introduce his cartoon show on CBS. It ran until 1955 and was largely forgotten, although the network remembered it well enough to buy Terry's entire cartoon library after he retired and every TV print used an instrumental version of the Barker Bill theme.