http://www.schneier.com/blog/archives/2006/02/check_washing.html A guide to using the best inks that are resistant to check washing.
http://www.delosis.com/listening/home.html A test to judge your listening skills.
http://www.teagames.com/games/blueprint/play.php The Blueprint Game requires you to use the given objects to send a ball from start to finish.
Tags