Well, what do ya' know!(I become more southern when i'm excited) I remember all of those sponsors, and I think the bug episode is one of the Elmo's World segments that I remember the most from when I was little. And I wonder what source these episodes came from, because these are in fantastic quality.
Also, some interesting things about the second episode listed. For one thing, it's interesting to see what must have been one of David Rudman's first performances as Cookie Monster. He's really come a long way since then. Also, it's super weird seeing Ruth Buzzi play a character on the street that isn't Ruthie.