From Joyous Music School in Long Island, New York, this is perhaps the youngest string quartet ever: The Joyous String Quartet. Above, they perform Katy Perry’s Firework. Below, from Nikolai Rimsky-Korsakov‘s The Tale of Tsar Saltan, the quartet performs Flight of Bumblebee:

Update: Their version of Summer (Presto) was removed from YouTube.

Watch these next: Landfill Harmonic, Don’t You Worry Child for 5 Cellos, Ebene Quartet for NPR Music Field Recordings, and The Sea Pig – Songs for Unusual Creatures featuring Kronos Quartet.

Bonus vid: How playing an instrument benefits your brain.

Thanks, @elakdawalla.

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