I made a drum controller for our Networked Pong Game!
I used a Piezo drum kit from Sparkfun and a Cashew can.
Each Piezo needs a resistor soldered in parallel, (conveniently included in the Sparkfun kit!) then I attached the piezo’s to the can’s lid. The Arduino fit nicely inside. With more time, I would have added LED’s to light up as the drum is struck.