Watch flying robots from Penn alumni perform ‘Carol of the Bells’

The flying robots are at it again.

This time, they’re performing “Carol of the Bells” with all sorts of jerry-rigged instruments, like a custom single string guitar hooked up to an amp. These are robots from KMeL Robotics, the startup run by Penn grads that’s based at Penn’s new South Bank campus.

The video was done by Kurtis Sensenig.

The robots will be performing live this weekend at the USA Science & Engineering Festival in Washington, D.C.