Hmmm...I don't remember for certain what the Jr. Gemini sign looks like. It's most certainly not one of the old signs because the old kid didn't have a candy-cane...instead he had a calibrated arm ("you must be as tall as my outstretched arm...").
It was the same kid on all rides, regardless of the height. I don't know if they moved him up and down, or if they just varied the height of the tree stump he was standing on.
--Dave Althoff, Jr.