See, I don't think that HIT would have the rights to Pinwheel. MuppetDude, here's a chance for me to help you out for once.
Pinwheel was this show back on Nickelodeon in the early to mid 1980's. Rully remember that one since it was seen on a par with SS by yours truly. This show blended human actors, puppet characters, claymation shorts, and animated segments. And now that I think of it, there are many parallels between SS and Pinwheel.
There was the main house inhabited by...
The two puppet kids named Plus and Minus, who had a plus and/or minus math symbol on their overall shirts for their respective names. Hmm, sounds like a certain duo from the bowels of 123 SS.
Then there were these two boy and girl Doodlebugs, who were like big friendly insect puppets. Rather different than the little buggers found in the SS windowboxes.
There was a mime named Cocoa who taught everyone about opposites in the popular Opposite City sketches. Reminds me of the SS librairian who's a personal hero of mine.
Then there was a snail puppet who lived in the garden area, who had a straw hat, old man glasses and a bowtie. Hmmm, could be compared to a certain 8' yellow bird's outside living quarters next to the main building.
The main human actors were a husband and wife team, the guy looked like he had scraggly grayish hair sideburns and mustache. They both ran the newspaper from inside the main house.
The other two main puppet characters were an old gypsy lady and this greenish long-nosed guy I forget their names.
This guy with the pointy nose and the green complexion was very much like the guy who lives in the trashcan.
These descripts might seem somewhat vague, but it's been years since I've seen the show and I doubt I could come up with better ones owing to my blind batty eyes now.
Oh yyeah, the most popular claymation segments were of what was known as Hattytown where all the characters had their profession's hats as their heads. Except the donkey who was the pet/best friend of the Mexican sombrero.
Hope this helps and have a good weekend.