Online Games that Challenge the Brain
Tired of brainless flash-games? Do some mental weight-lifting while still procrastinating!
Riddles, Illusions and Logic Games
The one who makes it sells it.
The one who buys it doesn't use it.
The one who's using it doesn't know he's using it.
What is it ?
More links after the break.
Geometry Step by Step from the Land of the Incas
Geometry your Math teacher might not understand.. plus puzzles and other colorful time-wasters. The experience comes complete with weird electronic music.
A large collection of interesting and interactive illusions that you might not have seem before.
Good clean fun your mom can't complain about.
More challenging than a Jigsaw puzzle, I still haven't gotten the hang of these.