Do any of you remember this song that popped into my head this morning?

"They played jump rope, but the rope, it broke.
So they just sat around telling knock-knock jokes..."

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Absolutely! They only ever released a handful of classic Sesame Street episodes on VHS, but "the ladybugs twelve" was on Vol. 1 when the teens were sproglings...
OH. Ladybugs 12 At The Ladybug Picnic!