Warning: The following video will make you grin uncontrollably.

Late Night‘s occasional “classroom instruments” videos — in which Jimmy Fallon, the Roots, and special guests perform popular songs accompanied only by woodblocks, toy xylophones, and the like — are generally pretty great. For pure joy value, though, none of the previous clips can compare to this one — which features Fallon and his band performing Sesame Street‘s theme song with Big Bird, Elmo, Grover, and the rest of that show’s principal cast of muppets.

They’re counted in by The Count. Partway through, Cookie Monster devours his instrument. The Roots’ Black Thought does a Sesame Street-themed rap, assisted by Abby Cadabby. This video is, in short, awesome, and you should watch it immediately.

Want a full rundown of who’s playing what? Your wish is our command:

Jimmy Fallon – wood block, Casio keyboard

Questlove – kazoo, hand clackers

Frank Knuckles – bongos

Captain Kirk – ukulele

Kamal Gray – xylophone

Mark Kelley – toy clarinet

James Poyser – melodica

Tuba Gooding Jr. – toy saxophone, slide whistle

Black Thought – apple shaker

Elmo – vocals

Grover – backing vocals

Cookie Monster – banana shaker (eaten)

Abby Cadabby – toy guitar

Zoe – hand cymbals

Big Bird – vocals

Aloysius Snuffleupagus – backing vocals

The Count — counting

Late Night with Jimmy Fallon
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