Music by Joe Raposo
Lyrics by Jeff Moss
Date 1973
Publisher Backfin Music Co.; Jonico Music Inc.

David sings "The Arm" to teach everyone how to do a new dance with him. You shake your arm to do "The Arm", your leg to do "The Leg", and your thumb to do "The Thumb".

In a later episode of the show, Savion has some kids do "The Arm" with him. Gordon later sang the song at The White House Easter Egg Roll in 2012. An instrumental, rock 'n' roll version of the song was heard on the radio in a 1990s sketch where Elmo and Telly have a sleepover.