Music by Philip Balsam
Lyrics by Dennis Lee

The "Rumble Bug Hum" is a song whose words were composed by Red to accompany the melodic humming of the Rumble Bugs. The song is featured in the Fraggle Rock episode "All Work and All Play."

The Rumble Bugs themselves were seen again 3 years after Fraggle Rock ended as background characters in The Song of the Cloud Forest.

The tune was later used as "(You Were) Born to Laugh" in "The Invasion of the Toe Ticklers".

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