A while ago I read on Get LoFi that you can "listen" to an electronic flickering candle by attaching a speaker to the LED. I decided to try this, so I went out and bought two packs of electronic flickering candles. Just attaching a speaker to the candle did not do anything but short it out, but I realized I could make a photocoupler by putting a photocell in front of the flickering LED. By doing to this to two (or more) candles and attaching them all to an output jack, it's pretty easy to make a cool electronic noisemaker. Each candle (even ones of the same make) is slightly different, so you will get different sounds from all of them.