We've retired this Java 1.1 applet because of security issues: Java (and Flash) both require you to put a plugin on your machine. We're replacing our applets with JavaScript versions that need no plug in -- and therefore no security problem. And, your students can play the new versions on their pads, phones, etc., as well as on a PC!

Here's the new version: try it on anything.

We'd appreciate any feedback on the new applets.