This stop-motion animation film was created for Sesame Street by Jim Henson. A group of twelve rocks remove themselves from a crowd and are counted out, before taking the shape of a numeral 12.
A small amount of original music and electronic effects underscore the action, with a brief reference to a military bugle charge. Henson recorded the sped-up voices of each individual rock, as well as the low-voiced number 12. The Greenwich (CT) High School football team were recruited for the group chants.
The segment was filmed between October 21 and 24, 1970. It won an award for Best Animated Film at the First World Festival of Animation in Zagreb, Yugoslavia in 1972.
When the film was shown in Episode 3809, Zoe says that it's Rocco's favorite movie, and gives him the opportunity to appear in it at the end when Zoe holds him up in front of the finished number 12.