Its hard to describe Serindip except to say that its a cool site with a lot of interesting hands demonstrations and thought provoking articles about the human mind.

The Psychology Department at Purdue University has put together some cool online Cognitive Psychology Experiments that you can try out.

The NASA Ames Research Center conducts research on issues in human cognitive and perceptual processes and has put together this set of fun cognitive tutorials.

Learn about how attention operates by trying out the Stroop Effect.

The California Science Musuem, the Exploratorium has a cool webpage devoted to the operations of human memory called the Memory Web.  Check it out.

Learn about ways to improve your memory at Mind Tools' Memory and Mnemonics page

In the interests of shameless self-promotion, you should also check out the False Memory Reading Group that's run by the Lampinen Lab at the University of Arkansas.

Gary Wells of Iowa State University has a great homepage with information about eyewitness identification.

The Implicit Association Test, a collaboration between researchers at the University of Washington and Yale University is a measure of unconscious or implicit social stereotypes.  Check it out, if you dare.

If you are interested in mental imagery a great resource is Nigel Thomas's Imagination, Mental Imagery, Consciousness and Cognition page.

One of the classic problem solving games studied by Cognitive Psychologists is the "Missionaries and Cannibals" game.  Check out this cool version of the game call the Calvin and Hobbes game developed by Shishin Yamada.

Another classic game studied by psychologists is the Tower of Hanoi.  Andrew Cumming has a cool VRML version of the game that illustrates nicely the concept of a problem space as well as a nice discussion of how to solve the problem.

A game designed to test people's probablistic reasoning is called the Monty Hall Problem or sometimes the Three Door Problem.  There are some great discussions of the Monty Hall Problem on the web as well.  But play the game before you read about it!  Sheeesh!