Mokey's Jam Session

From Muppet Wiki

"Mokey's Jam Session" is an upbeat instrumental song played by Mokey on flute, Boober on washboard, and Wembley on bongos in the Fraggle Rock episode "The Lost Treasure of the Fraggles."

The tune is also used over a montage of the various unusual creatures that have come from the Muppet Workshop in the documentary Down at Fraggle Rock.