Mystery of creepy 1970s Sesame Street clip solved

I didn't truly appreciate what a miracle is YouTube til I realized how many half-remembered Sesame Street sketches, songs and puppet shows from my grainy, nostalgic childhood could be found there. Some of them seem quite odd in retrospect, and there are folks out there dedicated to tracking down the oddest.

Jon Armond and friends had some lingering memories of a 1970s song-animation where the cracks on a girl's wall come to life and become her friends — Crack Camel, Crack Monkey and Crack Hen.

It all goes a bit creepy when they meet Master Crack, a large, monstrous face-like cluster in a corner of the room, plaster crumbling from the maws of his eyes. Who thought this would be a good idea to show children?

To find the "Master Crack" clip, Armond went on a veritable quest, recorded in this audio documentary. If Serial was just about trying to find weird old children's show clips from the 70s I'd be so hooked.

Anyone remember an old Sesame clip that was just the stop-motion transmutation of a sandbox into a desert scene, accompanied by gentle music? I think two toy rhinos were placed into it at the end. If you know that one and can find it, Tweet me (@leighalexander)!

[h/t Laughingsquid]