Saw this video and thought it was pretty impressive and creative! They are singing these songs in the video:

• “Rapper’s Delight” – Sugar Hill Gang.
• “Jump Around” – House of Pain.
• “Boom! Shake The Room” – DJ Jazzy Jeff & The Fresh Prince.

In the video they are using an instrument called the Stylophone which consists of a metal keyboard played by touching it with a stylus each note being connected to a voltage-controlled oscillator via a different-value resistor thus closing a circuit.