(Jon of the Clue Crew demonstrates near a computer.)  With gesture recognition software and a webcam, you can play one of these and actually hear yourself jam
[DOC] [TLE] 4.2.1 - Catb.org [PAR] Failing that, you can order by mail from The MIT Press 55 Hayward Street .... 
Railroad Club, the PDP-1 SPACEWAR hackers, and John McCarthy's original 
crew of LISPers.