mcguyver style...
You'll need an old dead hard drive, a computer fan, a 5V DC wall wort, a piece of plexiglass/plastic, a piece of antislide stuff (for like cabinets). Now all you need to know is that there are very powerful rare earth magnets inside hard drives.
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~~~~~~~~~_/ [][]| | /```\/```\/```\/```\/```\ |~~~~~~~~~~
~~~~~~~_/_______| |____NOW TRIPLE HOPPED______|~~~~~~~~~~
~~~___/[_]| 00 /| | \,,,/\,,,/\,,,/\,,,/\,,,/ |~~~~~~~~~~
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~~|=(*)[________]==(*)(*)=| \________/=(*)(*)=|~~~~~~~~~~
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