I mine with several.  My first miner was my original NES.  I used to play Super Mario Bros 3 in college on this baby.  I modded it similarly to retrominer.

I also have a modded XBox overclocked to 2.718GHz.  I cool it by immersing it in Fluorinert with a peltier junction on the CPU and a impeller forcing the fluid over the heat sink.  The Fluorinert is circulated through our 3,000 gallon cistern to dissipate heat.

I have other less interesting miners.