"Be warned, this is another extremely graphic tutorial featuring guts, dismemberment, and soldering."
"If you want to actually be able to throw your rodent and have it stick reliably, I'd advise more and stronger magnets in a variety of locations; just spread them around for maximum coverage. You could also make a magnet-laden outfit for your rodent, which would increase the effective power by omitting the insulating skin. Play around with it- this is the fun part!"
Link to the tutorial