Speaking of the original Rubber Duckie, in The Muppet's: A Celebration of Thirty Years, there is a clip of a verison of the song that I haven't seen anywhere else. It has Ernie singing, but instead of a blue background, it looked like the regular living room set is used, and I think the Rubber Duckie made quacks instead of squeaks. Is this actually the original version, or is the one with the blue background the original version?
That was actually the Rubber Duckie skit from the pilot of Sesame Street that was never aired, but they did air that original Rubber Duckie skit on the show a few times during the 1980's, and mabye even before that. It's strange how they aired this, and it was even older than the very first show.