For a long time, the version of this classic clip floating around YouTube of the transmogrifying, four-armed, counting Swami from Sesame Street was missing the first part; it started counting at four.
But thanks to the efforts of a couple of vintage Sesame Street gurus of the two-armed, VHS-ripping variety, the full clip is now online in all its beautiful, trippy glory. AND it's available in Spanish, too; "once doce trece catorze..." has been ringing in my head for like 35 years.
Classic Sesame Street: Four-Armed Count to 20 (English) and Spanish [youtube]
Browse more vintage Sesame Street clips, uploaded by mstatz and ISNorden [youtube]
Previously: Daddy Dear, the Indian Guru, and the Sesame Street Lyrics Archive