Run a Mac, on a stick. “Running Linux, Windows or applications like Firefox, Thunderbird and AbiWord from a USB flash memory device is old hat. How about a Mac 128K or Plus on a USB key? Using a ‘portable’ Mac system you can: play with old system software and applications without dusting off your old Mac, impress your friends, or show others what the older Mac system looked like, use Mac on Windows and Linux.” Thanks Jim! Link.
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The older but still working Basilisk II emulator works with a wider range of Macintosh models, so you might try it instead of mini vmac. It does require a copy of the ROMs.