The only down sides, of course, are that you can't save files and can't add anything to his system. Friend's virtual Mac has a bunch of memorable, classic apps, including Microsoft Word and Excel, MacPaint, the Orion astronomy app, Stuffit, HyperCard, and Risk.
Loading up this page threw me right back to ninth grade. System 7 In Your BrowserBy far the easiest and most impressive way to check out an old-school Mac is James Friend's PCE.js, a Mac Plus with System 7 emulated in a browser window (click left). Best Malware Removal and Protection Software.