I'm working on some material for the cognitive psyc class I'm taking that starts in April, and the instructor directed us to this really cool webpage for tutorials...
http://psych.hanover.edu/Krantz/sen_tut.html
There's a LOT on there, enough to keep you distracted for quite some time. All sorts of visual and auditory perception tricks, some are REALLY cool and there were a couple that entertained me for a good 15 minutes each.
